Latitude 3520 Service Manual Regulatory Model: P108F Regulatory Type: P108F001/P108F002 2021 Rev.
Notes, cautions, and warnings NOTE: A NOTE indicates important information that helps you make better use of your product. CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem. WARNING: A WARNING indicates a potential for property damage, personal injury, or death. © 2021 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries.
Contents Chapter 1: Working inside your computer...................................................................................... 7 Safety instructions.............................................................................................................................................................. 7 Before working inside your computer....................................................................................................................... 7 Entering Service Mode.................
Removing the M.2 2280 solid-state drive............................................................................................................. 34 Installing the M.2 2280 solid-state drive............................................................................................................... 34 Hard-disk drive...................................................................................................................................................................
Removing the touchpad............................................................................................................................................. 73 Installing the touchpad............................................................................................................................................... 74 WWAN I/O board .............................................................................................................................................................
Backup media and recovery options............................................................................................................................ 116 WiFi power cycle.............................................................................................................................................................. 116 Flea power release.........................................................................................................................................................
1 Working inside your computer Topics: • Safety instructions Safety instructions Prerequisites Use the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unless otherwise noted, each procedure included in this document assumes that the following conditions exist: ● You have read the safety information that shipped with your computer.
3. Disconnect your computer and all attached devices from their electrical outlets. 4. Disconnect all attached network devices and peripherals, such as keyboard, mouse, and monitor from your computer. 5. Remove any media card and optical disc from your computer, if applicable. 6. After the computer is unplugged, press and hold the power button for 5 seconds to ground the system board. CAUTION: Place the computer on a flat, soft, and clean surface to avoid scratches on the display. 7.
Unplugging, pressing and holding the power button for 15 seconds should discharge residual power in the system board. Bonding Bonding is a method for connecting two or more grounding conductors to the same electrical potential. This is done through the use of a field service electrostatic discharge (ESD) kit. When connecting a bonding wire, ensure that it is connected to bare metal and never to a painted or non-metal surface.
● ESD Wrist Strap Tester – The wires inside of an ESD strap are prone to damage over time. When using an unmonitored kit, it is a best practice to regularly test the strap prior to each service call, and at a minimum, test once per week. A wrist strap tester is the best method for doing this test. If you do not have your own wrist strap tester, check with your regional office to find out if they have one.
2 Removing and installing components NOTE: The images in this document may differ from your computer depending on the configuration you ordered. Topics: • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Recommended tools Screw List Major components of your system MicroSD-card SIM card tray Base cover Battery cable Battery Memory module M.2 solid-state drive thermal plate M.2 solid-state drive conversion bracket M.
Screw List The following table shows the screw list and the image of the screws. Table 1. Screw list Component Screw type Quantity Base cover Captive screws 9 3-cell battery M2x3 3 4-cell battery M2x3 5 M.2 Solid-state drive bracket M2x3 1 M.2 Solid-state drive thermal plate M2x3 1 M.
Table 1. Screw list Component Screw type Quantity Hard disk-drive module Captive screws 4 Hard disk-drive M3x3 4 WLAN card M2x3 1 WWAN card M2x3 1 Display hinges M2.5x6 6 M2.5x4 1 System Fan M2x3 2 Heatsink assembly Captive screws 7 (For systems enabled with discrete graphic card) Image 4 (For systems enabled with integrated graphic card) Power adapter port M2x3 1 Ethernet port M2x5 2 I/O board M2x3 2 System board M2x5 2 Touchpad bracket M2.
Major components of your system 14 Removing and installing components
1. Base cover 2. Battery 3. Memory module 4. WLAN card 5. Solid-state drive 6. Solid-state drive conversion bracket 7. WWAN card 8. Power adapter port 9. Coin-cell battery 10. Touchpad bracket 11. System board 12. Touchpad 13. Computer chassis 14. Display assembly 15. WWAN I/O board 16. I/O board 17. System fan 18. Heatsink assembly 19. Ethernet port 20. Power-button board NOTE: Dell provides a list of components and their part numbers for the original system configuration purchased.
Steps 1. Push the microSD-card to eject it from the slot. 2. Remove the microSD-card from the system. Installing the MicroSD-card Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image provides a visual representation of the MicroSD-card installation procedure. Steps Insert the microSD-card into its slot until it clicks into place. Next steps 1.
Steps 1. Insert the SIM card removal pin into the release hole to release the SIM card tray. 2. Push the pin to disengage the lock, and eject the SIM card tray. 3. Slide the SIM card tray out of the slot on the computer. 4. Remove the MicroSIM-card from the SIM tray. 5. Slide the SIM card tray back into the slot on the computer. Installing the SIM card tray Prerequisites If you are replacing a component, remove the necessary component before the installation procedure.
Steps 1. Insert the SIM card removal pin into the release hole to remove the SIM card tray. 2. Push the pin to disengage the lock, and eject the SIM card tray. 3. Slide the SIM card tray out of the slot on the computer. 4. Align and place the MicroSIM-card in the dedicated slot on the SIM card tray. 5. Slide the SIM card tray back into the slot on the computer. Next steps 1. Install the microSD-card. 2. Follow the procedure in after working inside your computer.
About this task The following images indicate the location of the base cover and provide a visual representation of the removal procedure.
Steps 1. Loosen the nine captive screws that secure the base cover to the palmrest assembly. 2. Using a plastic scribe, pry open the base cover starting from the recesses located in the U-shaped indents near the hinges at the top edge of the base cover. 3. Carefully lift and remove the base cover from the chassis. NOTE: Be careful of the latches while removing the base cover as the latches may break.
Steps 1. Align and place the base cover on the palmrest assembly, and snap the base cover latches into place. 2. Tighten the nine captive screws to secure the base cover to the computer chassis. Next steps 1. 2. 3. 4. Exit the service mode Install the SIM card tray for 4G LTE enabled systems. Install the microSD-card. Follow the procedure in after working inside your computer. Battery cable Removing the battery cable Prerequisites 1. 2. 3. 4. Follow the procedure in before working inside your computer.
Steps 1. Disconnect the battery cable from the connector on the system board. 2. Peel the adhesive tapes and unroute the battery cable from routing channel in the battery. 3. Disconnect the battery cable from the connector on the battery. Installing the battery cable Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
Steps 1. Connect the battery cable to the connector on the battery. 2. Route the battery cable through the routing channel in the battery and adhere the adhesive tapes. 3. Connect the battery cable to the connector on the system board. Next steps 1. 2. 3. 4. Install the base cover. Install the SIM card tray for 4G LTE enabled systems. Install the microSD-card. Follow the procedure in after working inside your computer.
● If the battery gets stuck inside your computer as a result of swelling, do not try to release it as puncturing, bending, or crushing a lithium-ion battery can be dangerous. In such an instance, contact Dell technical support for assistance. See www.dell.com/contactdell. ● Always purchase genuine batteries from www.dell.com or authorized Dell partners and resellers. Removing the 3-cell battery Prerequisites 1. 2. 3. 4. Follow the procedure in before working inside your computer. Remove the microSD-card.
About this task The following image indicates the location of the battery and provides a visual representation of the installation procedure. NOTE: If the battery was disconnected from system board for service, there will be a delay during system boot as the system undergoes RTC battery reset. Steps 1. Align and place the battery in the slot on the palmrest assembly. 2. Install the three (M2X3) screws to secure the battery in place. 3. Connect the battery cable to the connector on the system board.
Steps 1. Disconnect the battery cable from the connector on the system board. 2. Remove the four (M2X3) screws that secure the battery in place. 3. Lift and remove the battery from the palmrest assembly. Installing the 4-cell battery Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image indicates the location of the battery and provides a visual representation of the installation procedure.
Steps 1. Align and place the battery in the slot on the palmrest assembly. 2. Install the four (M2X3) screws to secure the battery in place. 3. Connect the battery cable to the connector on the system board. Next steps 1. 2. 3. 4. Install the base cover. Install the SIM card tray for 4G LTE enabled systems. Install the microSD-card. Follow the procedure in after working inside your computer. Memory module Removing the memory module Prerequisites 1. 2. 3. 4. 5.
Steps 1. Lift the mylar to uncover the memory module. 2. Pry the retention clips securing the memory module slot until the memory module pops-up. 3. Remove the memory module from the memory module slot. Installing the memory module Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image indicates the location of the memory module and provides a visual representation of the installation procedure.
Steps 1. Lift the mylar to find the memory module slot. 2. Align the notch on the memory module with the tab on the memory-module slot. 3. Slide the memory module firmly into the slot at an angle. 4. Press the memory module down until it clicks into place. NOTE: If you do not hear the click, remove the memory module and reinstall it. Next steps 1. 2. 3. 4. 5. Install the base cover. Exit the service mode Install the SIM card tray for 4G LTE enabled systems. Install the microSD-card.
M.2 solid-state drive thermal plate Replacing the M.2 solid-state drive thermal plate Prerequisites 1. 2. 3. 4. 5. Follow the procedure in before working inside your computer. Remove the microSD-card. Remove the SIM card tray for 4G LTE enabled systems. Enter the service mode. Remove the base cover. About this task The following image indicates the location of the M.2 solid-state drive thermal plate and provides a visual representation of the removal procedure.
3. Install the (M2x3) screw to secure the solid-state drive thermal plate to the solid-state drive conversion bracket. M.2 solid-state drive conversion bracket Removing the M.2 solid-state drive conversion bracket Prerequisites 1. 2. 3. 4. 5. Follow the procedure in before working inside your computer. Remove the microSD-card. Remove the SIM card tray for 4G LTE enabled systems. Enter the service mode. Remove the base cover. About this task The following image indicates the location of the M.
Steps 1. Align and place the solid-state drive conversion bracket on the system board. 2. Install the two (M2x3) screws to secure the solid-state drive conversion bracket to the system board. Next steps 1. 2. 3. 4. 5. Install the base cover. Exit the service mode Install the SIM card tray for 4G LTE enabled systems. Install the microSD-card. Follow the procedure in after working inside your computer. M.2 solid-state drive Removing the M.2 2230 solid-state drive Prerequisites 1. 2. 3. 4. 5.
Steps 1. Remove the (M2x3) screw that secures the solid-state drive to the system board. 2. Slide and remove the solid-state drive from the solid-state drive slot on the system board. Installing the M.2 2230 solid-state drive Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image indicates the location of the solid-state drive and provides a visual representation of the installation procedure. Steps 1.
2. Slide the solid-state drive into the solid-state drive slot on the system board. 3. Replace the (M2x3) screw to secure the solid-state drive to the system board. Next steps 1. 2. 3. 4. 5. Install the base cover. Exit the service mode Install the SIM card tray for 4G LTE enabled systems. Install the microSD-card. Follow the procedure in after working inside your computer. Removing the M.2 2280 solid-state drive Prerequisites 1. 2. 3. 4. 5. Follow the procedure in before working inside your computer.
About this task The following image indicates the location of the solid-state drive and provides a visual representation of the installation procedure. Steps 1. Align the notch on the solid-state drive with the tab on the solid-state drive slot. 2. Slide the solid-state drive into the solid-state drive slot on the system board. 3. Replace the (M2x3) screw to secure the solid-state drive to the system board. Next steps 1. 2. 3. 4. 5. Install the base cover.
Steps 1. Lift and disconnect the hard-disk drive cable from the connector on the system board. 2. Loosen the four captive screws that secure the hard-disk drive module to the palmrest assembly. 3. Lift and remove the hard-disk drive module from the slot on the palmrest assembly. Removing the hard-disk drive bracket Prerequisites 1. 2. 3. 4. 5. 6. Follow the procedure in before working inside your computer. Remove the microSD-card. Remove the SIM card tray for 4G LTE enabled systems.
Steps 1. Disconnect the hard-disk drive cable from the connector on the hard-disk drive bracket. 2. Remove the four (M3x3) screws that secure the hard-disk drive to the hard-disk drive bracket. 3. Flip the hard-disk drive bracket, lift the silver foil, and remove the hard-disk drive from the hard-disk drive bracket. Installing the hard-disk drive bracket Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
Steps 1. Lift the silver foil, align and place the hard-disk drive in the hard-disk drive bracket. 2. Install the four (M3x3) screws to secure the hard-disk drive to the hard-disk drive bracket. 3. Connect the hard-disk drive cable to the connector on the hard-disk drive bracket. Next steps 1. 2. 3. 4. 5. 6. Install the hard-disk drive. Install the base cover. Exit the service mode Install the SIM card tray for 4G LTE enabled systems. Install the microSD-card.
About this task The following image indicates the location of the hard-disk drive and provides a visual representation of the installation procedure. NOTE: Systems that are shipped with 3-cell battery contain a rubber bumper that must be removed manually before installing the hard-disk drive. Steps 1. Align and place the hard-disk drive module in the slot on the palmrest assembly. 2. Tighten the four captive screws to secure the hard-disk drive module to the palmrest assembly. 3.
About this task The following image indicates the location of the WLAN card and provides a visual representation of the removal procedure. Steps 1. Remove the screw (M2x3) that secures WLAN card bracket to the WLAN card on the system board. 2. Lift and remove the WLAN card bracket from the WLAN card that secures the two antenna cables. 3. Disconnect the antenna cables from the connectors on the WLAN card. 4. Disconnect and remove the WLAN card from the WLAN card slot.
Steps 1. Connect the two antenna cables to the connectors on the WLAN card. NOTE: The antenna cable connectors are fragile and utmost care should be taken while replacing them. Table 2. Antenna cable guide Cable color Connector White cable (Main) White triangle (△) on the WLAN module of the system board Black cable (Aux) Solid triangle (▲) on the WLAN module of the system board 2. Align the notch on the WLAN card with the tab on the WLAN card slot. 3.
2. 3. 4. 5. Exit the service mode Install the SIM card tray for 4G LTE enabled systems. Install the microSD-card. Follow the procedure in after working inside your computer. WWAN card Removing the WWAN card Prerequisites 1. 2. 3. 4. 5. Follow the procedure in before working inside your computer. Remove the microSD-card. Remove the SIM card tray for 4G LTE enabled systems. Enter the service mode. Remove the base cover.
Steps 1. Remove the screw (M2x3) that secures WWAN card bracket to the WWAN card on the system board. 2. Lift and remove the WWAN card bracket from the WWAN card that secures the two antenna cables. 3. Disconnect the antenna cables from the connectors on the WWAN card. 4. Disconnect and remove the WWAN card from the WWAN card slot. Installing the WWAN card Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
Table 3. Antenna cable guide Cable color Connector White cable (Main) White triangle (△) on the WLAN module of the system board Black cable (Aux) Solid triangle (▲) on the WLAN module of the system board 2. Align the notch on the WWAN card with the tab on the WWAN card slot. 3. Slide the WWAN card at an angle into the WWAN card slot. 4. Align and place the WLAN card bracket on the WLAN card. 5. Install the screw (M2x3) to secure the WLAN card bracket on the WLAN card to the system board. Next steps 1.
Steps 1. Peel the adhesive tape, open the latch and disconnect the I/O cable from the connector on the system board. 2. Peel the adhesive tape and unroute the I/O cable from the routing guides in the palmrest assembly. 3. Peel the adhesive tape, open the latch and disconnect the I/O cable from the connector on the I/O board. 4. Lift and remove the I/O cable from the palmrest assembly.
Steps 1. Route the I/O cable through the routing guides and adhere the adhesive tape to secure the I/O cable in place. 2. Adhere the adhesive tape, connect the I/O cable to the connector on the system board, and close the latch. 3. Adhere the adhesive tape, connect the I/O cable to the connector on the I/O board, and close the latch. Next steps 1. 2. 3. 4. 5. Install the base cover. Exit the service mode Install the microSD-card. Install the SIM card tray for 4G LTE enabled systems.
About this task The following images indicate the location of the display assembly and provide a visual representation of the removal procedure.
Steps 1. Unroute the display cable from the routing guides in the palmrest assembly. 2. Peel the adhesive tape that secures the display cable in place. 3. Open the latch and disconnect the display cable from the connector on the system board. 4. Remove the (M2.5x4) and six (M2.5x6) screws that secure the display hinges to the system. 5. Lift the left and right hinges in upward direction away from the palmrest assembly. 6. Lift the display assembly off the palmrest assembly.
Installing the display assembly Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following images indicate the location of the display assembly and provide a visual representation of the installation procedure.
Steps 1. Align and place the system chassis under the hinges of the display assembly. 2. Press the left and right hinges in downward direction toward the palmrest assembly. 3. Install the (M2.5x4) and six (M2.5x6) screws to secure the display hinges to the palmrest assembly. 4. Connect the display cable to the connector on the system board and close the latch. 5. Route the display cable through the routing guides in the palmrest assembly. 6. Affix the adhesive tape to secures the display cable in place.
System fan Removing the system fan Prerequisites 1. 2. 3. 4. 5. Follow the procedure in before working inside your computer. Remove the microSD-card. Remove the SIM card tray for systems enabled with 4G LTE. Enter the service mode. Remove the base cover. About this task The following image indicates the location of the system fan and provides a visual representation of the removal procedure. Steps 1. Disconnect the system fan cable from the connector on the system board. 2.
About this task The following image indicates the location of the system fan and provides a visual representation of the installation procedure. Steps 1. Align and place the system fan into the slot on the palmrest assembly. 2. Install the two (M2x3) screws to secure the system fan to the palmrest assembly. 3. Connect the system fan cable to the connector on the system board. Next steps 1. 2. 3. 4. 5. Install the base cover. Exit the service mode Install the SIM card tray for systems enabled with 4G LTE.
About this task The following images indicate the location of the heatsink assembly and provide a visual representation of the removal procedure. NOTE: The following images are from systems shipped with discrete graphic card. The system board has a different configuration for integrated graphic cards. Steps 1. For systems enabled with integrated graphic card, loosen the four captive screws (in reverse order, 4->3->2->1) that secure the heatsink assembly to the system board. 2.
Steps 1. Align and place the heatsink assembly into the slot on the system board. 2. For systems enabled with integrated graphic card, tighten the four captive screws to secure the heatsink assembly to the system board. 3. For systems enabled with discrete graphic card, tighten the seven captive screws to secure the heatsink assembly to the system board. Next steps 1. 2. 3. 4. 5. Install the base cover. Exit the service mode Install the SIM card tray for systems enabled with 4G LTE.
About this task The following image indicates the location of the power adapter port and provides a visual representation of the removal procedure. Steps 1. Remove the (M2.5x4) and two (M2.5x6) screws that secure the display hinges to the system. 2. Disconnect the power adapter port from the connector on the system board. 3. Remove the (M2x3) screw that secures the power adapter port to the palmrest assembly. 4. Lift and remove the power adapter port from the palmrest assembly.
Steps 1. Align and place the power adapter port on the palmrest assembly. 2. Install the (M2x3) screw to secure the power adapter port to the palmrest assembly. 3. Connect the power adapter port to the connector on the system board. 4. Install the (M2.5x4) and two (M2.5x6) screws to secure the display hinges to the system. Next steps 1. 2. 3. 4. 5. Install the base cover. Exit the service mode Install the SIM card tray for 4G LTE enabled systems. Install the microSD-card.
Steps 1. Disconnect the coin-cell battery cable from the connector on the I/O board. 2. Lift and remove the coin-cell battery from the palmrest assembly. Installing the coin-cell battery Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image indicates the location of the coin-cell battery and provides a visual representation of the installation procedure.
Steps 1. Align and place the coin-cell battery on the palmrest assembly. 2. Connect the coin-cell battery cable to the connector on the I/O board. Next steps 1. 2. 3. 4. 5. Install the base cover. Exit the service mode Install the SIM card tray for 4G LTE enabled systems. Install the microSD-card. Follow the procedure in after working inside your computer. USB cable Removing the USB cable Prerequisites 1. 2. 3. 4. 5. 6. Follow the procedure in before working inside your computer. Remove the microSD-card.
Steps 1. Open the latch and disconnect the USB cable from the connector on the system board. 2. Carefully peel the USB cable from the palmrest assembly. 3. Open the latch and disconnect the USB cable from the connector on the I/O board. 4. Lift and remove the USB cable from the palmrest assembly. Installing the USB cable Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
Steps 1. Connect the USB cable to the connector on the system board and close the latch. 2. Align and adhere the USB cable on the palmrest assembly. 3. Connect the USB cable to the connector on the I/O board and close the latch. Next steps 1. 2. 3. 4. 5. 6. Install the hard-disk drive. Install the battery. Install the base cover. Install the SIM card tray for 4G LTE enabled systems. Install the microSD-card. Follow the procedure in after working inside your computer.
3. Remove the two (M2x5) screws that secure the ethernet on the I/O board. 4. Lift and remove the ethernet from the I/O board. Installing the ethernet port Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image indicates the location of the ethernet port and provides a visual representation of the installation procedure. Steps 1. Align and place the ethernet on the I/O board. 2.
I/O board Removing the I/O board Prerequisites 1. 2. 3. 4. 5. 6. Follow the procedure in before working inside your computer. Remove the microSD-card. Remove the SIM card tray for 4G LTE enabled systems. Enter the service mode. Remove the base cover. Remove the ethernet port. About this task NOTE: The following image is from computers with discrete graphic card. For computers with integrated graphic card, the system board has a different configuration.
Installing the I/O board Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task NOTE: The following image is from computers with discrete graphic card. For computers with integrated graphic card, the system board has a different configuration. The following image indicates the location of the I/O board and provides a visual representation of the installation procedure. Steps 1.
Power-button board Removing the power-button board Prerequisites 1. 2. 3. 4. 5. 6. 7. Follow the procedure in before working inside your computer. Remove the microSD-card. Remove the SIM card tray for 4G LTE enabled systems. Enter the service mode. Remove the base cover. Remove the I/O board. Remove the ethernet port. About this task The following image indicates the location of the power-button board and provides a visual representation of the removal procedure.
Steps 1. Affix the power-button cable with adhesive backing. 2. Align and place the power-button board into the slot on the palmrest assembly. Next steps 1. 2. 3. 4. 5. 6. 7. Install the ethernet port. Install the I/O board. Install the base cover. Exit the service mode Install the SIM card tray for 4G LTE enabled systems. Install the microSD-card. Follow the procedure in after working inside your computer. System board Removing the system board Prerequisites 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
About this task Figure 1. System board connectors 1. 3. 5. 7. 9. 11. 13. System fan cable Power adapter cable Keyboard backlit LED cable Touchpad cable WLAN card connector USB cable I/O cable 2. 4. 6. 8. 10. 12. 14. Display cable Memory module connector Keyboard cable Battery cable Hard-disk drive cable Speaker cable M.2 SSD connector The following images indicate the location of the system board and provide a visual representation of the removal procedure.
Removing and installing components 67
Steps 1. Remove the two (M2.5x6) and the (M2.5x4) screws that secure the hinge to the palmrest assembly. 2. Lift the hinge in upward direction away from the palmrest assembly. 3. For 4G LTE enabled systems, peel the WWAN I/O board cable from the palmrest assembly. 4. Disconnect the speaker cable, power adapter port cable, hard-disk drive cable, and system fan cable from the connector on the system board. 5.
About this task Figure 2. System board connectors 1. 3. 5. 7. 9. 11. 13. System fan cable Power adapter cable Keyboard backlit LED cable Touchpad cable WLAN card connector USB cable I/O cable 2. 4. 6. 8. 10. 12. 14. Display cable Memory module connector Keyboard cable Battery cable Hard-disk drive cable Speaker cable M.2 SSD connector The following images indicate the location of the system board and provide a visual representation of the installation procedure.
Removing and installing components
Steps 1. Align and place the system board into the slot on the palmrest assembly. 2. Install the two (M2x2) screws to secure the system board in place. 3. Align and place the type-c bracket on the system board. 4. Install the two (M2x5) screws to secure the type-c bracket in place. 5. Connect the display cable and I/O cable to the connector on the system board, close the latches and affix the adhesive tapes. 6.
Speakers Removing the speaker Prerequisites 1. 2. 3. 4. 5. Follow the procedure in before working inside your computer. Remove the microSD-card. Remove the SIM card tray for 4G LTE enabled systems. Remove the base cover. Remove the battery. About this task The following image indicates the location of the speakers and provides a visual representation of the removal procedure. Steps 1. Disconnect the speaker cable from the connector on the system board. 2.
Steps 1. Align and place the speakers into the slot on the palmrest assembly. 2. Route the speaker cable through the routing guides in the palmrest assembly. 3. Connect the speaker cable to the connector on the system board. 4. Affix the adhesive tapes to secure the speakers in place. Next steps 1. 2. 3. 4. 5. Install the battery. Install the base cover. Install the SIM card tray for 4G LTE enabled systems. Install the microSD-card. Follow the procedure in after working inside your computer.
Steps 1. Open the latch and disconnect the touchpad cable from the connector on the system board. 2. Peel the adhesive tapes that secure the touchpad module in place. 3. Remove the three (M2.5x2) screws that secure the touchpad bracket to the touchpad module. 4. Lift and remove the touchpad bracket from the touchpad module. 5. Remove the four (M2x2) screws that secure the touchpad module to the palmrest assembly. 6. Lift and remove the touchpad module from the palmrest assembly.
Steps 1. Align and place the touchpad module into the slot on the palmrest assembly. 2. Install the four (M2x2) screws to secure the touchpad module to the palmrest assembly. 3. Align and place the touchpad bracket on the touchpad module. 4. Install the three (M2.5x2) screws to secure the touchpad bracket to the touchpad module. 5. Affix the adhesive tapes to secure the touchpad module in place. 6. Connect the touchpad cable to the connector on the system board and close the latch. Next steps 1. 2. 3. 4. 5.
About this task The following image indicates the location of the WWAN I/O board and provides a visual representation of the removal procedure. NOTE: The following steps are applicable only for 4G LTE enabled systems. Steps 1. Remove the two (M2x3) screws that secure the WWAN I/O board to the palmrest assembly. 2. Open the latch and disconnect the WWAN cable from the connector on the WWAN I/O board. 3. Lift and remove the WWAN I/O board from the palmrest assembly.
Steps 1. Connect the WWAN cable to the connector on the WWAN I/O board and close the latch. 2. Align and place the WWAN I/O board into its slot on the palmrest assembly. 3. Install the two (M2x3) screws to secure the WWAN I/O board to the palmrest assembly. Next steps 1. 2. 3. 4. 5. Install the battery cable Install the base cover. Install the SIM card tray for 4G LTE enabled systems. Install the microSD card. Follow the procedure in After working on your computer.
14. Remove 15. Remove 16. Remove 17. Remove 18. Remove 19. Remove 20. Remove 21. Remove 22. Remove the the the the the the the the the display assembly. system fan. heatsink assembly. power adapter port. I/O board. coin-cell battery. USB cable. WWAN I/O board for systems enabled with 4G LTE. system board. NOTE: The system board can be removed along with the heat sink. About this task The following images indicate the location of the palmrest assembly.
Steps After performing the succeeding steps, you are left with the palmrest assembly. Next steps 1. Install the system board. 2. Install the WWAN I/O board for systems enabled with 4G LTE. 3. Install the USB cable. 4. Install the coin-cell battery. 5. Install the I/O board. 6. Install the power adapter port. 7. Install the heatsink assembly. 8. Install the system fan. 9. Install the display assembly. 10. Install the I/O board cable. 11. Install the WWAN card for systems enabled with 4G LTE. 12.
Display bezel Removing the display bezel Prerequisites 1. 2. 3. 4. 5. 6. 7. 8. 9. Follow the procedure in before working inside your computer. Remove the microSD-card. Remove the SIM card tray for 4G LTE enabled systems. Enter the service mode. Remove the base cover. Remove the WLAN card. Remove the WWAN card for 4G LTE enabled systems. Remove the I/O board cable. Remove the display assembly.
Installing the display bezel Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image indicates the location of the display bezel and provides a visual representation of the installation procedure. Steps Align the display bezel with the display assembly. Gently snap the display bezel into place. Next steps 1. 2. 3. 4. 5. 6. 7. 8. 9. Install the display assembly. Install the I/O board cable.
Display panel Removing the display panel Prerequisites 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Follow the procedure in before working inside your computer. Remove the microSD-card. Remove the SIM card tray for 4G LTE enabled systems. Enter the service mode. Remove the base cover. Remove the WLAN card. Remove the WWAN card for 4G LTE enabled systems. Remove the I/O board cable. Remove the display assembly. Remove the display bezel.
Removing and installing components 83
Removing and installing components
Steps 1. Remove the six (M2.5x2.5) and two (M2.5x3) screws that secure the left and right hinge brackets in place. 2. Gently flip over the display panel. 3. Peel the adhesive tape, open the latch and disconnect the display cable from the connector on the display panel. 4. Lift and remove the display panel from the display assembly. Installing the display panel Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
Removing and installing components
Steps 1. Align and place the display panel on the display assembly. 2. Connect the display cable to the connector on the display panel, close the latch and affix the adhesive tape. 3. Install the six (M2.5x2.5) and two (M2.5x3) screws to secure the left and right hinge brackets in place. 4. Gently flip over the display panel. Next steps 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Install the display bezel. Install the display assembly. Install the I/O board cable. Install the WWAN card for 4G LTE enabled systems..
Camera Removing the camera Prerequisites 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. Follow the procedure in before working inside your computer. Remove the microSD-card. Remove the SIM card tray for 4G LTE enabled systems. Enter the service mode. Remove the base cover. Remove the WLAN card. Remove the WWAN card for 4G LTE enabled systems. Remove the I/O board cable. Remove the display assembly. Remove the display bezel. Remove the display panel.
About this task The following image indicates the location of the camera and provides a visual representation of the installation procedure. Steps 1. Align and place the camera module into the slot on the display back-cover. 2. Connect the camera cable to the connector on the camera module. 3. Affix the adhesive tape to secure the camera cable to the connector on the camera module. 4. Align and affix the camera cable on the display back-cover. Next steps 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.
8. 9. 10. 11. Remove Remove Remove Remove the the the the I/O board cable. display assembly. display bezel. display panel. About this task The following image indicates the location of the display cable and provides a visual representation of the removal procedure. Steps 1. Disconnect the display cable from the connector on the system board. 2. Disconnect the display cable from the connector on the display panel. 3. Disconnect the display cable from the connector on the camera module.
About this task The following image indicates the location of the display cable and provides a visual representation of the installation procedure. Steps 1. Connect the display cable from the connector on the camera module. 2. Connect the display cable from the connector on the display panel. 3. Connect the display cable from the connector on the system board. Next steps 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. Install the display panel. Install the display bezel. Install the display assembly.
Display back-cover Removing the display back-cover Prerequisites 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Follow the procedure in before working inside your computer. Remove the microSD-card. Remove the SIM card tray for 4G LTE enabled systems. Enter the service mode. Remove the base cover. Remove the WLAN card. Remove the WWAN card for 4G LTE enabled systems. Remove the I/O board cable. Remove the display assembly. Remove the display bezel. Remove the display panel. Remove the camera.
About this task The following image indicates the location of the display back-cover and provides a visual representation of the installation procedure. Steps After performing the succeeding steps, you are left with the base cover assembly. Next steps 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Install the display cable. Install the camera. Install the display panel. Install the display bezel. Install the display assembly. Install the I/O board cable. Install the WWAN card for 4G LTE enabled systems. .
3 Drivers and downloads When troubleshooting, downloading, or installing drivers, it is recommended that you read the Dell knowledge base article, Drivers and Downloads FAQs .
4 System setup CAUTION: Unless you are an expert computer user, do not change the settings in the BIOS Setup program. Certain changes can make your computer work incorrectly. NOTE: Before you change BIOS Setup program, it is recommended that you write down the BIOS Setup program screen information for future reference. Use the BIOS Setup program for the following purposes: ● Get information about the hardware installed in your computer, such as the amount of RAM and the size of the hard drive.
● Removable Drive (if available) ● STXXXX Drive NOTE: XXXX denotes the SATA drive number. ● Optical Drive (if available) ● SATA Hard Drive (if available) ● Diagnostics NOTE: Choosing Diagnostics, displays the SupportAssist screen. The boot sequence screen also displays the option to access the System Setup screen. Navigation keys NOTE: For most of the System Setup options, changes that you make are recorded but do not take effect until you restart the system.
Table 4. System setup options—System information menu Overview Processor Information Processor Type Displays the processor type. Maximum Clock Speed Displays the maximum processor clock speed. Minimum Clock Speed Displays the minimum processor clock speed. Current Clock Speed Displays the current processor clock speed. Core Count Displays the number of cores on the processor. Processor ID Displays the processor identification code. Processor L2 Cache Displays the processor L2 Cache size.
Table 5. System setup options—Boot Configuration menu Boot Configuration Boot Sequence Displays the boot sequence. Secure Digital (SD) Card Boot Enable or disable the SD card read-only boot. By default, the Secure Digital (SD) Card Boot option is not enabled. Secure Boot Enable Secure Boot Enable or disable the secure boot feature. By default, the option is disabled. Secure Boot Mode Allows you to modify the secure boot mode options. By default, the Deployed Mode is enabled.
Table 7. System setup options—Storage menu Storage SATA/NVMe Operation Set the operating mode of the integrated storage device controller. By default, the RAID On option is enabled. Storage interface Port Enablement This page allows you to enable the onboard drives. By default, the SATA-1 option is enabled. By default, the M.2 PCIe SSD-1 option is enabled. SMART Reporting Enable SMART Reporting Enable or disable Self-Monitoring, Analysis, and Reporting Technology (SMART) during system startup.
Table 9. System setup options—Connection menu Connection Integrated NIC If enabled, UEFI network protocols are installed and available, allowing pre-OS and early OS networking features to use any enabled NICs. The option Enable with PXE is enabled by default. Wireless Device Enable WWAN/GPS (For systems with discrete video card only) Enable or disable the internal WWAN/GPS device. By default, the option enabled. The WWAN Bus Mode option is used to set the interface type of the WWAN card.
Table 10. System setup options—Power menu Power By default, the Optimized option is enabled. USB Wake Support Enable USB Wake Support Enables USB wake support. By default, the Enable USB Wake Support option is disabled. Wake on Dell USB-C Dock When enabled, connecting a Dell USB-C Dock will wake the system from standby. By default, the Wake on Dell USB-C Dock option is enabled. Block Sleep Enables to block entering sleep (S3) mode in the operating system. By default, the Block Sleep option is disabled.
Table 11. System setup options—Security menu Security By default, the option is enabled. SMM Security Mitigation Enable or disable SMM Security Mitigation. By default, the option is enabled. Data Wipe on Next Boot Start Data Wipe Enable or disable the data wipe on next boot. By default, the option is disabled. Absolute Enable or disable or permanently disable the BIOS module interface of the optional Absolute Persistence Module service from Absolute software. By default, the option is enabled.
Table 12. System setup options—Passwords menu Passwords Master Password Lockout Enable Master Password Lockout When enabled, this disables the master password support. By default, the option is disabled. Allow Non-Admin PSID Revert(For systems with discrete video card only) Enable Allow Non-Admin PSID Revert Controls access to the Physical Security ID (PSID) revert of NVMe hard-drives from the Dell Security Manager prompt. By default, the option is disabled. Table 13.
Table 14. System setup options—System Management menu System Management Auto on Time Enable to set the system to turn on automatically every day or on a preselected date and time. This option can be configured only if the Auto On Time is set to Everyday, Weekdays, or Selected Days. By default, the option is disabled. Table 15. System setup options—Keyboard menu Keyboard Numlock Options By default, the Numlock option is enabled. Fn Lock Options By default, the Fn lock option is enabled.
Table 17. System setup options—Virtualization menu Virtualization By default, the option is enabled. VT for Direct I/O Specify whether a Virtual Machine Monitor (VMM) can use the additional hardware capabilities that are provided by Intel Virtualization Technology for Direct I/O. By default, the option is enabled. Table 18. System setup options—Performance menu Performance Multi Core Support Active Cores Enables to change the number of CPU cores available to the operating system.
Updating the BIOS in Windows Prerequisites It is recommended to update your BIOS (System Setup), when you replace the system board or if an update is available. About this task NOTE: If BitLocker is enabled, it must be suspended before updating the system BIOS, and then re-enabled after the BIOS update is completed. Steps 1. Restart the computer. 2. Go ● ● ● to www.dell.com/support. Enter the Service Tag or Express Service Code and click Search. Click Drivers & Downloads.
2. Copy the .exe file onto the bootable USB flash drive. 3. Insert the USB flash drive into the computer that requires the BIOS update. 4. Restart the computer and press F12 when the Dell logo appears to display the One Time Boot Menu. 5. Using arrow keys, select USB Storage Device and press Enter. 6. The computer restarts to a Diag C:\> prompt. 7. Run the file by typing the complete filename and press Enter. 8. The BIOS Update Utility is displayed. Follow the on-screen instructions. Figure 3.
Steps 1. In the System BIOS or System Setup screen, select Security and press Enter. The Security screen is displayed. 2. Select System/Admin Password and create a password in the Enter the new password field. Use the following guidelines to assign the system password: ● A password can have up to 32 characters. ● The password can contain the numbers 0 through 9. ● Only lower case letters are valid, upper case letters are not allowed.
5 Troubleshooting Topics: • • • • • • • • • • • • Built-in self-test (BIST) LCD Built-in Self Test (BIST) Dell SupportAssist Pre-boot System Performance Check diagnostics Diagnostic LED behavior Diagnostic error messages System error messages Recovering the operating system Real-Time Clock (RTC Reset) Flashing the BIOS Backup media and recovery options WiFi power cycle Flea power release Built-in self-test (BIST) About this task There are three different types of BIST to check the performance of display,
When you notice screen abnormalities like flickering, distortion, clarity issues, fuzzy or blurry image, horizontal or vertical lines, color fade etc., it is always a good practice to isolate the LCD (screen) by running the Built-In Self Test (BIST). How to invoke LCD BIST Test 1. 2. 3. 4. Power off the Dell laptop. Disconnect any peripherals that are connected to the laptop. Connect only the AC adapter (charger) to the laptop.
Diagnostic LED behavior Table 22. Diagnostic LED behavior Blinking pattern Amber White Problem description Suggested resolution 1 1 TPM detection failure Replace the system board. 1 2 Unrecoverable SPI Flash Failure Replace the system board. 1 5 EC unable to program i-Fuse Replace the system board. 1 6 Generic catch-all for ungraceful EC code flow errors Disconnect all power source (AC, battery, coin cell) and drain flea power by pressing & holding down power button.
Table 22. Diagnostic LED behavior Blinking pattern Amber White Problem description Suggested resolution 3 3 BIOS Recovery image not found ● ● Flash latest BIOS version If problem persists, replace the system board. 3 4 BIOS Recovery image found but invalid ● ● Flash latest BIOS version If problem persists, replace the system board. 3 5 Power rail failure Replace the system board. 3 6 Flash corruption detected by SBIOS. Replace the system board.
Table 23. Diagnostic error messages Error messages Description A FILENAME CANNOT CONTAIN ANY OF THE FOLLOWING CHARACTERS: \ / : * ? " < > | - Do not use these characters in filenames. GATE A20 FAILURE A memory module may be loose. Reinstall the memory module or, if necessary, replace it. GENERAL FAILURE The operating system is unable to carry out the command. The message is usually followed by specific information. For example, Printer out of paper. Take the appropriate action.
Table 23. Diagnostic error messages Error messages Description MEMORY ADDRESS LINE FAILURE AT ADDRESS, READ VALUE EXPECTING VALUE A memory module may be faulty or improperly seated. Reinstall the memory module or, if necessary, replace it. MEMORY ALLOCATION ERROR The software you are attempting to run is conflicting with the operating system, another program, or a utility. Shut down the computer, wait for 30 seconds, and then restart it. Run the program again.
Table 23. Diagnostic error messages Error messages Description TIMER CHIP COUNTER 2 FAILED A chip on the system board may be malfunctioning. Run the System Set tests in Dell Diagnostics. UNEXPECTED INTERRUPT IN PROTECTED MODE The keyboard controller may be malfunctioning, or a memory module may be loose. Run the System Memory tests and the Keyboard Controller test in Dell Diagnostics or Contact Dell. X:\ IS NOT ACCESSIBLE. THE DEVICE IS NOT READY Insert a disk into the drive and try again.
You can also download it from the Dell Support website to troubleshoot and fix your computer when it fails to boot into their primary operating system due to software or hardware failures. For more information about the Dell SupportAssist OS Recovery, see Dell SupportAssist OS Recovery User's Guide at www.dell.com/support. Real-Time Clock (RTC Reset) The Real Time Clock (RTC) reset function allows you or the service technician to recover Dell Inspiron, systems from No POST/No Power/No Boot situations.
4. Wait for 30 seconds. 5. Turn on the wireless router. 6. Turn on the modem. 7. Turn on your computer. Flea power release About this task Flea power is the residual static electricity that remains on the computer even after it has been powered off and the battery has been removed. The following procedure provides the instructions on how to conduct flea power release: Steps 1. Turn off your computer. 2. Disconnect the power adapter from your computer. 3.
6 Getting help and contacting Dell Self-help resources You can get information and help on Dell products and services using these self-help resources: Table 25. Self-help resources Self-help resources Resource location Information about Dell products and services www.dell.com My Dell app Tips Contact Support In Windows search, type Contact Support, and press Enter. Online help for operating system www.dell.
