Asteroids G05-801. Perfect picture for 5 mins then a circle appears in the middle of the screen.

Ok, I have an Asteroids with a G05-801 in it. When the game is first turned on, the picture is perfect.

However, the Spot Killer is on, and after about 5 minutes, a circle and dot show up in the center of the screen.

http://www.arcaderestoration.com/graphics/repair/AsteroidsCircleInMiddle.jpg

I capped the monitor and here is what has been replaced so far in the Spot Killer section:

 Q503
 Q506
 R518
 R528
 R529
 R523
 R524

Any help would be greatly appreciated!

-- 
Brien King
spammehere@arcaderestoration.com
Visit the Arcade Restoration Workshop @ http://www.arcaderestoration.com
Home of Cart Commander, the Ultimate Cartridge Cataloging Utility!
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