Donkey Kong lines - Video RAM? Color PROMs?

modessitt

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Got a Donkey Kong cocktail in the shop that was said to "freeze" at times. When I powered it up, I got this:

20130212_114423_zpsc73f6da5.jpg

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I tried reseating chips, but haven't looked into anything else yet. This is a 4-bd set...
 
Bad eprom sockets. I had this issue once.

EDIT: Also, I see bad eproms. Specifically the 2716's in row 4 on the clock board. See here (from the braze page):

bad7e-3.gif



Bad 7E (which is 4R on the clock board)

The freezing is likely due to another bad socket somewhere too. (separate issue)

PM Darthi8nt on this - he's run into this before.
 
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