Dell Latitude 5280 Owner's Manual

Removing system board

1. Follow the procedure in Before working inside your computer.
2. Remove the:
   1. SIM card
   2. base cover
   3. battery
   4. keyboard trim
   5. keyboard
   6. WLAN card
   7. WWAN card (optional)
   8. hard drive assembly(optional)
   9. SSD card
   10. memory module
   11. coin cell battery
   12. heatsink assembly
   13. chassis frame
3. Disconnect the following cables from the system board:
   1. Touchpad [1]
   2. LED board [2]
   3. USH board [3]
      
4. To release the system board:
   1. Remove the M2*3 screw that secures the display cable [1].
   2. Lift the metal bracket that secures the display cable [2].
   3. Disconnect the display cables from the connectors on the system board [3][4].

      NOTE: This step is applicable only for IR camera.

   4. Disconnect the power connector port cable from the connector on the system board [5].
   5. Remove the M2*3 screws that secure the metal bracket [6].

      NOTE: The metal bracket secures the DisplayPort over USB Type-C.

   6. Lift the metal bracket away from the system board [7].
   
5. To remove the system board:
   1. Remove the M2*3 screws that secure the system board to the computer [1].
   2. Lift the system board away from the computer [2].