Service Manual

Removing the system board
WARNING: Before working inside your computer, read the safety information that shipped with your computer and
follow the steps in Before working inside your computer. After working inside your computer, follow the instructions
in
After working inside your computer. For more safety best practices, see the Regulatory Compliance home page at
www.dell.com/regulatory_compliance.
NOTE: Your computer’s Service Tag is stored in the system board. You must enter the Service Tag in the BIOS setup
program after you replace the system board.
NOTE: Replacing the system board removes any changes you have made to the BIOS using the BIOS setup program.
You must make the appropriate changes again after you replace the system board.
NOTE: Before disconnecting the cables from the system board, note the location of the connectors so that you can
reconnect the cables correctly after you replace the system board.
Prerequisites
1 Remove the left-side cover.
2 Follow the procedure from step 1 to step 4 in "Removing the power-supply unit".
3 Remove the memory modules.
4 Remove the solid-state drive.
5 Remove the wireless card.
6 Remove the processor fan and heat-sink assembly .
7 Remove the graphics card.
8 Remove the processor.
Procedure
NOTE: Note the routing of all cables as you remove them so that you can reroute them correctly after you replace the
system board. For information on system board connectors, see "
System-board components".
1 Disconnect the top panel USB cables from the system board.
2 Disconnect the optical drive data cable from the system board.
3 Disconnect the hard drive data cable from the system board.
4 Disconnect the front panel audio cable from the system board.
5 Disconnect the LED controller cable from the system board.
6 Disconnect the graphics-card power cable from the system board.
7 Disconnect the processor power cable from the system board.
8 Disconnect the top-chassis fan cable from the system board.
9 Disconnect the system-board power cable from the system board.
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