So hopefully threadjacking is better than a new thread. I have some issues with my Coco 3 as well. I have no problem doing repairs but am not great at diagnosis so here goes with the questions. I've played a few different games just today, haven't used the computer in a year or two before this and noticed that sometimes games boot in black and white. It happened with Skiing, a Coco 1 game and then had color after a few resets. Robocop is always black and white and I played Arkanoid and any letter M is corrupted in the game. Also what's with Arkanoid having a jittery Vaus no matter what joystick I use?
The video is also ripply, is this bad capacitors? I can do the caps no problem if so. Are the other issues bad ram? If so is it best to replace all and I also want to upgrade to 512k for sure.
Any help is appreciated.