/vr/ - Retro Games

I'm having some issues with an Atari 7800. It will not boot any 2600 games, all of which have been tested on a 2600. 7800 games do boot, but most of the games will reset randomly. Pole Position 2 resets after a few minutes, but Ms. Pac Man resets about a second after leaving the title screen. Centipede is the only game I have that I haven't seen reset yet. Also, is this what the 7800 boot screen is supposed to look like? The bar changes colors, but the word "ATARI" is difficult to read. None of the games have graphical glitches.

I've read that the reason it won't boot 2600 games could be that some of the pins on the cartridge slot are shorted to ground. I haven't had a chance to check that yet, but could that also explain the resetting? I've thoroughly cleaned the games and slot btw.