By
NearTao
Tue May 24, 2022 12:16 pm
If I remember correctly, those are CPU register codes, and I'd imagine you'd be hard pressed to figure out what they mean. Effectively it is telling you that it cannot proceed further for some reason. Here are a few thoughts...
You said you left it on for an extended length of time. Generally this will heat things up a lot more, and can lead to expansion and contraction issues, so you may have loose cables, the firmware chips may have oxidized and are not fully connected, a solder joint may have gone bad... those sorts of problems.
Due to this kind of heat expansion/contraction issue, you'll see some people will take old computers, like Atari computers, and just drop them to "fix" them. Sometimes it is just enough force to kind of reseat a chip, nudge a ribbon cable to get electrical contact, or whatever... but obviously this isn't going to solve the root problem, which in this case is old/faulty connections... that just need to be cleaned.
Personally, if you're any good working on electronics, as well as careful and patient, I'd probably take the top off, and try and check one connection at a time. For example, unseat and reseat one of the firmware chips, and you may not even need to take it out of the socket, just pulling it up a little and pushing it back down may knock some of the crud off of the connection to get a proper electrical connection again. Similarly, a ribbon cable may have just come unseated from heat expansion and contraction, and just disconnecting and then replugging it back in properly could solve your problem.
Again though... I'll repeat this... just do *one* thing at a time, and turn it back on between adjustments. This way you can see if you are making things worse, they stay the same, or if they change, or they get better. Don't be afraid to take notes, record videos, or anything else... because you never know when you might capture something that you didn't think was a big deal but you notice later that can help solve the puzzle.
And yeah, all this older gear especially can be a hassle, but as long as you take it as a learning experience, and know when to walk away when you get frustrated, you'll absolutely learn something, and with any luck get it back to working again.