I have a Radio Shack Pro-43. My 3 button was not working on the
keypad so I disassembled and cleaned the circuit board and the back
side of the rubber keypad with rubbing alchohol. Now most of the keys
do not work. I thought I was cleaning gunk off the contacts when I
probably cleaned some type of conductive gel off the keypad.

Does anyone have any experience or knowledge on this problem?

thanks