This is part of a series for the Retro Challenge 2019/3. Visit the index page for all the posts.
A much more productive day on the Retro Challenge. I managed to fix one of my two broken Video Genie computers. The Video Genie (aka System 80) is a TRS-80 clone which I grew up with.
Quite a few interesting diagnostic steps in this repair! Watch this 32 minute video for the full story: