Dell inspiron 7778, 7778-5469 [83/153] Prerequisites

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 base cover.

2 Remove the battery.

3 Remove the memory modules.

4 Remove the heat sink.

5 Remove the solid-state drive.

Procedure

1 Peel off the pieces of tape that secure the display cable and touch-screen

board cable to the connectors on the system board.

2 Open the latches and disconnect the display cable and the touch-screen

board cable from the system board.

3 Peel off the display cable and the touch-screen board cable from the

system board.

4 Disconnect the power-adapter cable and the speaker cable from the

system board.