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.
Topics:
• Prerequisites
• Procedure
Prerequisites
1 Remove the computer cover.
2 Remove the front bezel.
3 Remove the memory module.
4 Remove the solid-state drive/Intel Optane memory.
5 Remove the graphics card.
6 Remove the wireless card.
7 Remove the processor fan and heat-sink assembly.
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’.
NOTE: Depending on the conguration ordered your computer may have up to two 2.5-inch hard drives installed. If only one hard
drive is installed skip step 3 or step 5 where applicable.
1 Disconnect the processor-power cable from the system board (ATX CPU).
2 Disconnect the optical-drive data cable from the system board (SATA 2).
3 Disconnect the hard-drive data cable from the system board (SATA 1).
4 Disconnect the hard-drive cable from the system board (SATA 0).
5 Disconnect the hard-drive data cable from the system board (SATA 3).
6 Disconnect the hard-drive power cable from the system board (SATA PWR).
7 Disconnect the hard-drive power cables from the system board (SATA PWR).
8 Disconnect the power-supply unit cable (P1) from the system board (ATX SYS).
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52 Removing the system board