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I recently picked up a paperboy. the guy I bought the game from pulled a monitor (wg k7935) from a narc, and put in into pb. he was never able to get the picture in sync and gave up. I spent a few hours trying to get sync with no luck.

what I have tried so far-
checked for a good ground. ( the harness is new so connectors are good.)i even tried running a ground from the switching power supply.

I've checked the header pins for cold solder joints

I tested the pcb in another cabinet. works 100%

I've have tried both video connectors on the pb harness. both same results. I have also tried different configurations of the sync wires. no luck

should this med res k7000 just be a drop in replacement? could there be a chasis issue that needs repair? not sure what to try next. any help would be appreciated
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