I have vertical bars now after replacing the battery. I “seated” all the roms by pressing them down lightly before I put it back together again after the battery replacement; did I ruin a rom while doing that?
Idk what I did wrong but it works now. I took it apart and put it back together again. I made sure a and b boards were seated properly together and made sure the screws were even torqued down. I plugged it back in and works with no more vertical bars! I never knew Cps2 was so finicky. Kinda places my confidence with this stuff back to square one. Lol.