Dell Latitude 7280 Owner's Manual

Removing system board

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

If your computer is shipped with a WWAN card, then the removal of a blank SIM card tray is a requirement.

2. Remove the SIM card.
3. Remove the base cover.
4. Disconnect the battery cable from the connector on the system board.
5. Remove the memory module.
6. Remove the PCIe SSD.
7. Remove the WLAN card.
8. Remove the WWAN card.
9. Remove the heat sink assembly.

10. To disconnect the eDP cable:
    NOTE If your system is shipped with an IR camera, then the IR cable must be disconnected. The IR cable is located beneath the eDP cable connector.
    1. Un route the WLAN and WWAN cables from the routing channels [1].
    2. Remove the M2.0 x 3.0 screws that secure the eDP cable [2].
    3. Remove the eDP cable bracket [3].
    4. Disconnect the eDP cable from the system board [4].
    5. Lift the tape that secures the eDP cable to the system board [5].
    
11. To disconnect the cables:
    NOTE To disconnect the speaker, LED board, coin cell battery and the power connector port cables, use a plastic scribe to release the cable from the connector. Do not pull the cable as it may result in breakage.
    1. speaker cable [1]
    2. LED board cable [2]
    3. coin cell battery cable [3]
    4. touchpad cable and USH board cable [4]
    5. power connector port cable [5]
    
12. To remove the system board:
    1. Disconnect the M2.0x3.0 screws that secure the system board to computer [1].
    2. Lift the system board away from the computer.
    
13. Remove the M2.0x5.0 screws that secure the USB Type-C bracket.
    
14. Flip the system board, peel off the tapes securing the bracket and remove the USB Type-C port from the system board.