Dell 3451 Service Manual download pdf (Page 52)

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 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

desired 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 them correctly

after you replace the system board.

Prerequisites

1 Remove the battery.

2 Remove the base cover.

3 Follow the procedure from step 1 to step 3 in “Removing the hard drive”.

4 Remove the keyboard.

5 Follow the procedure from step 1 to step 8 in "Removing the palm rest".

Procedure

1 Peel the tape that secures the display cable to the system board.

2 Lift the latches and disconnect the display cable and I/O-board cable

from the system board.

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Dell 3451 Service Manual Page 52