Outrun Malfunction

mobilevp

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Just did a recap -- but did not solve all of the problems.

Picture looks great after recap, however -- (After driving through the 2nd Checkpoint) in the Stage 2 section (where the car is driven into the Desert Scene) the screen goes horizontal half blue and half white (the picture blooms) to where you cannot see any of the scene except the red car (you cannot see the road) -- and you have no control of the car -- and the car seems stuck off the roadway (tires spinning - tires smoking - off the road sound effect) -- and no amount of steering gets you back onto the roadway to continue -- the game clock counts down and you cannot go any further. I would like to be able to get to the next Stage -- but this is impossible with this malfunction.

Could this be a CAP or ROM issue? I did reinsert all of the ROMS on both the CPU and Video Boards -- that did not fix it.

Where can I send the boards to be troubleshooted and evaluated?

Has anyone seen this aberration before?
 

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With the power off and unplugged, try metering from each ROM leg to the associated solder pad or trace.

Look for any that are high resistance. Burnish and clean up if you find any.

If you don't find any, you may have a ROM with a bad address or section, or corrupted program. It sounds like you are racing off the grid.
 
Sounds more likely a ROM issue. Have you tried test mode? It'll self-test some of the ROMs.
 
Test Mode says everything is OK.
How do you correct a corrupted or bad address ROM?
 
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