Anyone ever seen this? LSI board. Cartridge is fine (tests on another board ok), even without a cartridge, the "no cartridge" text is mangled. The palette looks off too. Thinking maybe an address line. Any ideas?
Sadly this didn't fix anything. Not sure where to look next. I'd initially want to look at the alphanumerics, but the palette makes it a bit more complicated. The LSI schematics also aren't labeled like the TTL.