Vertical Collapse on WG 7401

pondosinatra

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Ok, I've done some digging around on here - a bad vertical IC (U601) seems to be the common culprit. Lots of people mention R303 - it's definitely not open, I get 1.2 Ohms. From what I can tell (not an expert) flyback looks ok. No cracks or goop coming out.

Have a multi-meter but not sure how to test the IC.

Annoyed because this is in a Namco Class of 1981, which to me seems brand new (ok it came out in 2000 something) - still out of all my games I wouldn't have thought it'd be the first to fail.

Suggestions?
 
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