Owners Manual
Table Of Contents
- Dell EMC PowerEdge R940xa Installation and Service Manual
- Contents
- About this document
- PowerEdge R940xa system overview
- Initial system setup and configuration
- Installing and removing system components
- Safety instructions
- Before working inside your system
- After working inside your system
- Recommended tools
- Front bezel
- Drives
- System cover
- Support bar
- Cooling fans
- Cooling fan assembly
- Optional USB 3.0 module
- Optional optical drive
- Control panel
- Air shroud
- NVDIMM-N battery
- Drive backplane
- System memory
- Processors and heat sinks
- Expansion cards and expansion card risers
- Expansion card installation guidelines
- Removing the expansion card riser
- Installing the expansion card riser
- Removing the expansion card from the riser
- Installing the expansion card in the riser
- Removing the expansion card from the system board
- Installing the expansion card on the system board
- GPU card installation guidelines
- Removing the GPU
- Installing the GPU
- M.2 SSD module
- Optional IDSDM or vFlash module
- Network daughter card
- System battery
- Optional internal USB memory key
- Power supply units
- Power interposer board
- Trusted Platform Module
- System board
- Jumpers and connectors
- System diagnostics and indicator codes
- Getting help
- Documentation resources
Table 20. System board connectors (continued)
Item Connector Description
39
J_FRONT_VIDEO Front video connector
40
J_SATA_3
SATA C connector—Optical drive SATA connector
41 A3, A9, A2, A8, A1, A7 Memory module sockets for CPU 1 DIMMs — Channels 0/1/2
42 A10, A4, A11, A5, A12, A6 Memory module sockets for CPU 1 DIMMs — Channels 3/4/5
43 CPU1 CPU 1 processor and heat sink module socket—with dust cover
44 SATA D PCIe signal M5
45 SATA E PCIe signal M4
46 SATA F PCIe signal M6
System board jumper settings
For information on resetting the password jumper to disable a password, see the Disabling a forgotten password section.
Table 21. System board jumper settings
Jumper Setting Description
PWRD_EN The BIOS password feature is enabled.
The BIOS password feature is disabled. iDRAC local access is unlocked at next AC power cycle.
iDRAC password reset is enabled in F2 iDRAC settings menu.
NVRAM_C
LR
The BIOS configuration settings are retained at system boot.
The BIOS configuration settings are cleared at system boot.
CAUTION: Be careful when altering BIOS settings. The BIOS interface is designed for advanced users, you can
change a setting that could prevent your computer from starting correctly and you could suffer a potential loss
of data.
1. Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet.
2. Remove the system cover.
3. Move the jumper (NVRAM_CLR) on the system board jumper from pins 3 and 5 to pins 1 and 3 and wait approximately 10
seconds. Move the 2-pin jumper (PWRD_EN) plug from the password jumper to pins into the CMOS jumper.
4. Replace the jumper plug on pins 3 and 5.
5. Install the system cover. Plug in AC Power to the system and wait ten seconds for the CMOS to clear, reconnect the system
to its electrical outlet and turn on the system, including any attached peripherals.
Disabling a forgotten password
The system's software security features include a system password and a setup password. The password jumper enables these
password features or disables them and clears any password(s) currently in use.
Prerequisites
CAUTION:
Many repairs may only be done by a certified service technician. You should only perform
troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or
140 Jumpers and connectors