Dell P105F Service Manual page 40

Steps
1. Remove the two (M2x4) screws that secure the Type-C bracket to the system board and lift the Type-C bracket off the
system board.
2. Peel the tape that secures the display cable to the system board.
3. Open the latch and disconnect the display cable from the system board and place it on a flat and clean surface.
4. Open the latch and disconnect the power-adapter port cable from the system board.
5. Disconnect the left fan cable from the system board.
6. Open the latch and disconnect the I/O-board cable from the system board.
7. Disconnect the speaker cable from the system board.
8. Open the latch and disconnect the keyboard cable from the system board.
9. Open the latch and disconnect the keyboard-backlight cable from the system board.
10. Open the latch and disconnect the touchpad cable from the system board.
11. Open the latch and disconnect the 4 zone keyboard cable from the system board (optional).
12. Disconnect the right fan cable from the system board.
13. Open the latch and disconnect the power-button cable from the USB board.
CAUTION: Before removing the system board, give sufficient time for the heat sink to cool down to avoid
injury.
14. Remove the (M2x2) screw that secures the left fan to the to the palm-rest and keyboard assembly.
15. Remove the five (M2x4) screws that secure the system board to the palm-rest and keyboard assembly.
NOTE: USB board, and heat sink are attached to the system board.
40 Removing and installing components