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Palm Rest

Dell™ Latitude™ C840 Service Manual

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.

1

pull loop

NOTICE: The reserve battery provides power to the computer's time RTC and NVRAM when the computer is turned off. Removing the palm rest disconnects the reserve battery and causes the computer to lose the date and time information as well as all user-specified parameters in NVRAM. If possible, copy the information before you disconnect the reserve battery.

Removing the Palm Rest

1. Follow the instructions in "Preparing to Work Inside the Computer."
   
   
2. Remove the hard drive and the fixed optical drive.
   
   
3. Remove the keyboard.
   
   
4. Remove the hinge cover.
   
   
5. Remove the display assembly.
   
   

NOTICE: To avoid damaging the palm rest, you must first remove the display assembly.

6. Turn the computer over.
   
   
7. Remove the nine M2.5 x 20-mm screws (labeled "circle P") that secure the palm rest to the computer.
   
   

1	M2.5 x 20-mm screws (9)

8. Turn the computer over.
   
   
9. Use the pull loop to disconnect the palm-rest flex cable from the touch-pad connector on the system board.
   
   
10. On the left and right sides of the palm rest, use a flat-blade scribe between the palm rest and the bottom case of the computer to separate the snaps that secure the palm rest to the bottom case.
    
    
11. Lift out the palm rest.
    
    

Replacing the Palm Rest

When replacing the palm rest screws, install the two screws at the back corners of the computer first to help align the palm rest correctly.

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