Fixing the Keyboard on a Cambridge Z88 and a Quick Preview of Future Projects This was a quick repair of Cambridge Z88 keyboard. I didn't even need to heat up the soldering iron! My future projects: 1) Replacing the stuck potentiometers on my TRS-80 Model 3 2) Replacing the power supplies on my TRS-80 model 3 3) Testing and repairing two Commodore 64s 4) Testing and repairing a Commodore 1541 disk drive