Technical information
Table Of Contents
- System Specifications
- System Utilities
- Machine Disassembly and Replacement
- Disassembly Requirements
- External Module Disassembly Process
- Main Unit Disassembly Process
- Main Unit Disassembly Flowchart
- Removing the Keyboard
- Removing the Upper Cover
- Removing the LCD Module
- Removing the Bluetooth Module
- Removing the USB Board
- Removing the Mainboard
- Removing the LAN Board
- Removing the RTC Battery
- Removing the Thermal Module
- Removing the CPU
- Removing the PCH Heatsink
- Removing the DC-IN Cable Assembly
- Removing the Switch Board
- Removing the Power Board
- LCD Module Disassembly Process
- LCD Reassembly Procedure
- Main Unit Reassembly Process
- Replacing the Power Assembly
- Replacing the PCH Thermal Module
- Replacing the CPU
- Replacing the Thermal Module
- Replacing the RTC Battery
- Removing the LAN Board
- Replacing the Main Board
- Replacing the USB board
- Replacing the Bluetooth Module
- Replacing the LCD Module
- Replacing the Power Board
- Replacing the Switch Board
- Replacing the Upper Cover
- Replacing the Keyboard
- Replacing the Wireless LAN Module
- Replacing the DIMM Module
- Replacing the 2nd HDD Module
- Replacing the Hard Disk Drive
- Replacing the ODD Module
- Replacing the Base Door
- Replacing the Battery
- Replace the Dummy Card
- Troubleshooting
- Jumper and Connector Locations
- FRU (Field Replaceable Unit) List
- Model Definition and Configuration
- Test Compatible Components
- Online Support Information
Chapter 4 127
No Display Issue
If the Display doesn’t work, perform the following actions one at a time to correct the problem. Do not replace
non-defective FRUs:
No POST or Video
If the POST or video doesn’t display, perform the following actions one at a time to correct the problem.
1. Make sure that the internal display is selected. On this notebook model, switching between the internal
display and the external display is done by pressing Fn+F5. Reference Product pages for specific model
procedures.
2. Make sure the computer has power by checking at least one of the following occurs:
• Fans start up
• Status LEDs light up
If there is no power, see “Power On Issue” on page 126.
3. Drain any stored power by removing the power cable and battery and holding down the power button for
10 seconds. Reconnect the power and reboot the computer.
4. Connect an external monitor to the computer and switch between the internal display and the external
display is by pressing Fn+F5 (on this model).
If the POST or video appears on the external display, see “LCD Failure” on page 129.
5. Disconnect power and all external devices including port replicators or docking stations. Remove any
memory cards and CD/DVD discs. Restart the computer.
START
Power On ? No
Go to No Power
troubleshooting
step
Replace externa
l
DDRAM module
Remove and
replace thermal
module
Replace the
main board
Reconnect
SDRAM Module
LCD Module OK?
Replace LCD
Panel and
Cable
Ext. DDRAM module
connected properly?
Ext. DDRAM
module functional?
CPU Thermal
Module properly
connected?
No
No
No
No