Service Manual

System board

Removing the system board

Prerequisites

1. Follow the procedure in Before working inside your computer.

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.

NOTE: The Service Tag of your computer is stored in the system board. Enter the Service Tag in the BIOS setup

program after you replace the system board.

NOTE: Replacing the system board removes any changes that you have made to the BIOS using the BIOS setup

program. Make the appropriate changes again after you replace the system board.

NOTE: After your computer is reassembled and powered on, it prompts for the Real Time Clock (RTC) reset. When

the RTC reset cycle occurs, the computer restarts several times and then an error message is displayed- "Time of

day not set". Enter the BIOS when this error appears and set the date and time on your computer to resume normal

functionality.

2. Remove the base cover.

3. Remove the battery.

4. Remove the speakers.

5. Remove the memory.

6. Remove the solid state drive1.

7. Remove the solid state drive2.

8. Remove the heat sink.

NOTE:

The system board can be removed or installed together with the heat sink attached. This simplifies the

procedure and avoids breaking the thermal bond between the system board and the heat sink.

9. Remove the left fan.

10. Remove the right fan.

11. Remove the I/O board.

About this task

The following image indicates the connectors on your system board.

Figure 1. System-board connectors

1. Fingerprint reader-board cable

2. Antenna cables

3. Keyboard control-board cable

The following images indicate the location of the system board and provide a visual representation of the removal procedure.

Removing and installing components