Hi there, I'm having some problems with my 2600Jr. I had been working fine when I got it, but after a while, and after changing games, the console started to randomly display a snowy black and white picture with static noise coming off the TV speakers. Sometimes unplugging the power cord and turning the power switch on for a few seconds did the trick to bring back the colours, but now it doesn't do that any more: now when I turn the console on, the pictures very briefly appears in colours but quickly switch to black and white with noise. The games are otherwise playable.
Being able to have a brief normal picture after the console is fully discharged made me believe that it may be a capacitor problem. But which one? I tried changing the big 2200µF 16V one, but that didn't help. It's quite possible that the "new" capacitors I used could be bad too, I've had trouble sourcing them. I haven't touched any other cap in the machine, there are lots of them all over the place. None look bad, but I don't have the eye for it.
I tried installing the Tim's RGB mod, thinking it could be something in the RF modulator, but I couldn't get an image out of the mod. my problem may be interfering with whatever the mod does to output RGB.I've completely uninstalled the board for now. I also installed his new linear voltage regulator, which I'm still using.
What could be the problem here?
Edited by jarreboum, Mon Apr 9, 2018 7:48 AM.