Gyruss question.

Wundercade

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I was wondering if anyone has every seen this or repaired an artifact issue in Gyruss similar to this (please see video). Basically, there are vertical lines/boxes around some of the graphics. On the title screen it's around the Earth graphic. During game play, the artifacts are around the Gyruss ship, the bombs, and the approaching enemy craft.

Any idea on if this is a voltage, processor, ram, or rom issue?

I already reseated roms and checked their physical integrity with no change.

Sorry for the sideways vid, it's my first Youtube upload and not sure how to rotate/edit the vids yet.

 
Just to follow-up.

It was a bad ROM #9 causing the problem.

It's fixed now.





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