You can clean the metal surfaces where the touch pads make contact with the PC Board beneath the pads. A simple wipe with a dry Q-tip usually accomplishes the job, but if not, you can moisten the Q-tip lightly with alcohol. This should solve your problem.
The most difficult part about the job is removing all the screws on the bottom of the keyboard to gain access to the inside and keypad area. I suggest that after loosening the screws, place a piece of masking tape over the hole so the screw stays in the base of the case. You do this because some of the screws are longer and some are shorter, and the problem in remembering where each is located is eliminated. Just peel back the tape and the correct screw is in place and ready to be reinserted.
Hope this helps,
Gary
