Dell P105F Service Manual page 42

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.
About this task
The following image indicates the connectors on your system board.
1. Display cable
3. Fan cable
5. Speaker cable
7. Keyboard backlit cable
9. 4 zone keyboard cable
The following image indicates the location of the system board and provides a visual representation of the installation procedure.
42 Removing and installing components
2. Power-adapter port cable
4. I/O-board cable
6. Keyboard cable
8. Touchpad cable
10. Power-button cable