Atari System 1 / Garbled Text and Palette

FlashShift

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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?
 

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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.
 
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