I went to buy a Commodore Vic 20 also for only $20 (unknown state) and the seller offered to sell this to me for “whatever.” Currently it has a bad power supply, so I’m in the process of figuring that out.
I went to buy a Commodore Vic 20 also for only $20 (unknown state) and the seller offered to sell this to me for “whatever.” Currently it has a bad power supply, so I’m in the process of figuring that out.
Unfortunately it has a vintage aftermarket power supply in it. I found a bad transistor so far, the caps seem ok.
Ooh, I’ve blown up some transistors in my time (crack!), but never seen one go bad. But it is quite old!
This one is on the high voltage side it’s an NPN transistor p/n C3679. It’s showing connectivity through the collector and Emitter in both directions meaning it’s bad. I ordered several in case I pop the first one since there could be more bad components. If I can’t fix this one then I really need to get ahold of some kind of PSU that has -5v so that I can test the computer itself before I go spending $50+ on a good factory PSU.