Installing The System Board - Dell Inspiron 7400 Service Manual

3. Remove the two screws (M2x4) that secure the right-display hinge to the palm-rest and keyboard assembly.
4. Pry open the right-display hinge.
5. Remove the screw (M2x2.5) that secures the wireless-card bracket to the system board.
6. Lift the wireless-card bracket off the system board.
7. Disconnect the antenna cables from the system board.
8. Peel the tape that secures the antenna cables from the system board and move the antenna cables off the system board.
9. Disconnect the coin-cell battery cable from the system board.
10. Open the latch and disconnect the disconnect the fingerprint-reader board cable from the system board.
11. Peel that tape that secures the I/O-board cable connector latch to the system board.
12. Open the latch and disconnect the I/O-board cable from the system board.
13. Open the latch and disconnect the touchpad cable from the system board.
14. Open the latch and disconnect the keyboard cable from the system board.
15. Open the latch and disconnect the keyboard-backlight cable from the system board.
16. Disconnect the speaker cable from the system board.
17. Disconnect the power-adpater port cable from the system board.
18. Remove the screw (M2x2) that secures the system board to the palm-rest and keyboard assembly.
NOTE: This step only applies to computers shipped with a 6-cell (78 Wh) battery configuration.
19. Lift the system board at angle off the palm-rest and keyboard assembly.

Installing the system board

Prerequisites
If you are replacing a component, remove the existing component before performing the installation process.
About this task
The following image indicates the connectors on the system board.
1. Display cable
2. Power-adapter port cable
3. Speaker cable
4. Keyboard cable
5. Keyboard-backlight cable
Removing and installing components 57