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Arcade Collecting => Restorations & repair => Topic started by: telonio on July 11, 2021, 08:08:35 am

Title: Wonderboy bootleg jama distorted graphics
Post by: telonio on July 11, 2021, 08:08:35 am

I have a Wonderboy bootleg 2 layer pcb and as you can see in the photograph, usually it shows distorted graphics. Now when I move the pcb slightly, the graphics are fixed. So I guess that there must be some cold solder joints somewhere, but where?

https://i.postimg.cc/GhwvYTNX/20210711-143332.jpg


Thanks,

Title: Re: Wonderboy bootleg jama distorted graphics
Post by: Mike A on July 11, 2021, 08:53:48 am

Get a magnifying glass and look for the cold joint?

Push on individual chips and see if the image distorts.

Title: Re: Wonderboy bootleg jama distorted graphics
Post by: pbj on July 11, 2021, 09:53:31 am

Unseat and reseat the socketed chips.