XE & XL keyboard troubles
Hi all,
I've been getting my 8bits back in operation and run into some troubles with keyboards. I first dug out my 130XE and hooked it up, both 1050's work fine but the keyboard was getting flakey some keys weren't working like 1, 2, Q and some others that were not grouped together. I replaced the mylar with one I got from best and it improved marginally, more keys are working except HELP, SELECT, START, OPTION aren't working so well, SELECT & OPTION being the worst off. Suddenly this
Well, it turns out this topic was a timely discovery / discussion. My next 130XE on the cleanup list suffered from this exact problem with the function keys. All three of Start/Select/Option were non-responsive. Every other key on the keyboard worked perfectly, and visual inspection of the mylar showed it still in great condition.
Last night I checked the resistance on R134,R135,R136, and even though the computer was not registering the keypresses, I could see changes in the values
