I have a later-model Atari 2600 "Darth Vader" with a rev. 16 board. It worked fine a few years ago. But now when I power it on, with or without a cartridge, I just get a blank screen with a colored line down each side. It's a similar problem to the one posted here, but on a different model 2600:
I checked the voltage regulator and it has ~9V in and ~5V out, so that seems fine. The power switch looked fine, but I cleaned it anyway. I also cleaned the contacts in the cartridge slot as best I could. I checked the three main chips (TIA, CPU, and RIOT) and none of them feel hot while the unit is powered on.
Unfortunately, the chips are soldered onto the board instead of in sockets, so it's not a simple task to swap them out. With that in mind, is there anything else I can check and/or do to try and fix this system? I've never worked on a 2600 before, so I'm not exactly sure where to go from here.
And if it's dead, I'll just need to be ok with that. :-)