PET Care: Key Issues
It was somewhat annoying that even after the PET's successful repair many keys didn't work properly or even not at all. This could be resolved by applying an incredible and incredibly simple, yet proven procedure, involving both an eraser and some alcohol (like isopropanol).
Removing and disassembling the keyboard turned out to be rather simple (at least in comparison to the Sharp MZ-80A's keyboard) -- iff one is lucky enough to find a 1/4 inch spanner in a metric workshop... Also, one must bring oneself to desolder or even cut the two wires connected to the [SHIFT LOCK] key.
Back on duty
With all number pad keys back in working condition, games like Pernix (sort of Simon says on steroids) are fun to play again!