Popeye video board issues

TimePiloteer

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I have a Popeye board set with strange video glitches. I have a known good board set, and was able to isolate the problem to the bad set's video board. I swapped every single socketed video board chip from my good video board one by one into the bad board, and it did not fix the issue, so the video roms are good. It's got to be another chip on the board going bad.

Test mode indicates all ram ok and all roms ok.

Below are some pics of the issue. There is a lot of flickering on the screen, and as the game plays, chunks of the screen turn blocky yellow or green. Any ideas which chips I should look at further?
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Trying to get back to fixing this video glitch. I've uploaded a video of what the screen looks like.



I've tried piggybacking a good 2114 ram across the 3 different 2114 chips near the 5n rom, but it didn't seem to help.

Any ideas which chips I should start to take a look at?
 
Looks like one of the following
-Inverter Cable
-Inverter connector on the board the invert or the out to the chassis
-The cable for the inverter
-the connector on the chassis for the inverter

The graphics look good, just the invertor board isn't doing it's full job :D
 
Took me a very long time to get back to this one in my repair stack, but wanted to tie up this thread. This was a bad 74LS194 on the video board with dead output pins. The chip was intermittent, and sometimes would have bad outputs and cause all the random flashing glitches, other times the outputs were completely dead which lead to the other sprite corruption shown (lines through the sprites, missing blocks of sprites, etc). Piggybacking fixed the issues and after replacement 100% fixed.
 
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