Playchoice 10 upper monitor... what's this issue

Konidias

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Recently acquired a dual monitor PC 10... When I power it on the upper monitor is scrambled/skewed. Stays like this the entire time the game is powered on....

However, if I wait for the green menu to come up (still scrambled) and then power off/on the machine... the monitor works just fine.

It's an odd little glitch occurring... I'm wondering what is happening here. What would cause a monitor to be all scrambled but then fixed if I let the monitor fully turn on and then cycle it off and on again?

Just want to narrow down the troubleshooting so I'm not fiddling with things that probably aren't related.
 
the horizontal hold adjustment might just be a hair off. if the monitor has never been worked on it could also be a solder issue where it needs to warm up to make a better connection.
 
yeah, horizontal hold does that. that Nintendo wiring is pretty solid unless someone chopped the harness. old caps will make it loopy too.
 
We're you able to get this resolved? I recently picked up a PC10 that is having the exact same issue on the bottom monitor. Not sure where to start looking! Thanks!
 
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