Sears Video Arcade II - Video issue - Switches between color and black/white

[Vectorman0]

My systems will intermittently switch between color and black and white. It isn't a quick flicker between the two, but it will be color for a little while, maybe 30 minutes, then maybe next time I go to play it will start black and white. Then it might switch back to color.

Before I crack it open to take a peek inside, does anyone have an idea what the issue might be?

[FABombjoy]

Something in the color circuitry...

You can at least rule out the COLOR/B&W switch by playing a late-era game that isn't programmed for it.

On the inside, I'd probably suspect the color phase adjustment pot first.

[Mitch]

The voltage regulator would be my first suspect. Possibly the power supply could be a problem as well.

Mitch

[Vectorman0]

FAB & Mitch, thanks for the tips.

I actually figured out the problem, and it wasn't the Sears Video Arcade II; the TV that was broken! I figured I would bump this as a reminder for people to never assume the equipment you are using to test something is fully functional!