When I was a kid we had to return my Commodore 64 for repair several times, only to be told that once they got to it, after it had been waiting at the store for a few days, there were no problems with it.
Turned to be a result of storing the C64 on a bench under the "large" 26" CRT... When it was kept away from it for a while and had a chance to discharge, everything was ok. But after a while near the TV, it started "typing" gibberish of its own accord.
Turned to be a result of storing the C64 on a bench under the "large" 26" CRT... When it was kept away from it for a while and had a chance to discharge, everything was ok. But after a while near the TV, it started "typing" gibberish of its own accord.