Mk II resets

CEC_DFW

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Im sure I know the answer, but want someones else's opinion. I've got this board that resets after a few minutes. Intermittent issue, no one is playing it.

Brand new power supply adjusted properly

Thanks
 
Almost always a voltage issue, but sometimes re-seating the PLCC graphics chips will fix it too.
 
Seems to be more stable after leaving it plugged in for a while. May need to flow some solder on the back
 
clean the edge connector and clean and reseat the chips as well, are you testing it in a dedicated cab or a bench (can you test it in another cab if not on a bench)?
 
It has had the same issues on a bench and cab. Today it's in a dedicated cab. I think I may of worked out the issue. Reflowed back of the "processors" and reseated chips.

But now I have these damn horizontal lines during game play. Graphics issue
 
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