Dell Precision M40 - Manual (Page 24)

Removing the LED Board
1. Follow the instructions in " Preparing to Work Inside the Computer ."
2. Remove the hinge cover .
3. Remove the two 4-mm screws.
4. Lift the LED board away from its connector.
Replacing the LED Board
1. Align the two screw holes with the two mounting holes on the bottom case assembly, and press the board into its connector.
2. Replace the two 4-mm screws.
Fan Assembly
Fan Assembly
Removing the Fan Assembly
1. Follow the instructions in " Preparing to Work Inside the Computer ."
2. Remove the system board.
3. Remove the three 4-mm screws from the fan assembly.
4. Disconnect the two fan cables from the system board.
NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries.
NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.