Dell Precision 3550 Service Manual

Removing the system board

1. Press the lock and release the card slot tray [1,2].
2. Unlock and disconnect the LED board, USH and the touchpad cables from the connectors on the system board[3,4,5].
   
3. Remove the single screw securing the metal bracket to the computer [1] and lift it away from the computer [2].
4. Disconnect the fingerprint reader cable from the system board connector [3].
   
5. Remove the five (M2x3) screws that secure the system board to the computer [1].
6. Lift the system board out of the computer [2].