Pac-Man PCB Issues

Aeolus7

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Donor 2012
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Could use some help — I have a Ms. Pac cabaret with PCB troubles. Basically, it's a Pac-Man board with the HSS multi kit. It was working great and died suddenly with garbage on the screen

IMG_1847.jpeg

I've replaced all caps and the Z80 socket. I tried to isolate the issue by removing the HSS kit, putting the Z80 & other chips back in. I can't for the life of me find where I put 5E/5F :cautious: — So I'm testing without the full set. Not sure if that's wise, but here we are. Now, I get the checkered pattern below. And the game resets to a different pattern (with a click) after it warms up.

My question: is this expected behavior without the 5E/5F character chips or do I have something else going on?

IMG_1911.jpegIMG_1912.jpeg
 
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