Donkey Kong Jr Sync Problem please help!

noname707

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I recently picked up a DK Jr It fired up and plays you can here it coin up and play. But the screen was all messed up vert lines of Color from the game but you couldn't make anything out. I adjusted everything. and when I got to te horizontal hold adjustment it fixed it and it looked perfect I played it for a half an hour, very proud that I fixed it. I turned it off and came back out later to show my wife I fixed it and it was right back to the vert lines. What could cause this?
 
Another thing to look out for is the horizontal and vertical position pots on the game board. If you've got the picture too far shifted, it won't want to sync up right. Sometimes the pots go bad and cause this issue. Try moving them back and forth, and getting the picture lined up again.

-Ian
 
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