mutterminder Posted October 31, 2022 Share Posted October 31, 2022 (edited) I have three TRS-80 Model I computers that have been hanging out in my garage for about 20 years. For whatever reason, recently I decided to take them out to test. All of them are Level 2 BASIC, with 16K and and a numeric keypad. Two of them actually worked when I first powered them up. Of these two, both had a lower case mod installed, the older one was an Electric Pencil style mod with a switch (which seemed to be needed), the other contained the official Radio Shack lower case mod. The third machine powered up, but had some issues. A bunch of semi-random characters appeared on the screen and then the screen would slowly start filling with "A"s, starting at the bottom right corner. This is the one I decided to start with. Ultimately the main problem appeared to be the keyboard flex, which had deteriorated, and was shorting out internally. This was resolved by replacing the cable with an old IDE cable. I'll talk about what I did next in a further post. Edited October 31, 2022 by mutterminder Improvement 1 Quote Link to comment Share on other sites More sharing options...
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