I recently received my TRS-80 Model 100 from an ebay seller. The unit powers up fine, but has two minor issues.
1) Some of the keys work intermittently. They are in random locations, and don't appear to be associated with other keys like you would see with a bad trace. The keyboard was very dirty, so I cleaned it and used Deoxit on the key switches. That made no difference in the intermittent keys issue. The keys do eventually work if I keep pressing them. So that seems like dirty key switch contacts to me. I'm assuming that I will have to remove each key switch that has the issue from the PCB and clean them individually. 2) I noticed that two columns on the LCD have a partial failure (it's not from the top to the bottom of the screen). I'm not sure what to do about that. I'd rather not try to find a replacement LCD screen if possible. As an aside, I did replace the onboard battery that had started to leak. Luckily, nothing was damaged. I had an extra replacement that I had acquired from Jeff Birt when I had done a clone PC restoration project recently. Any suggestions to addressing the aforementioned issues is appreciated! Thank you! Joe
