Pole Position graphics issue

tatom

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Anybody have any ideas which chips I should check to fix the dark lines see pictures. I have several non working boards that I can swap chips from.
 

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Anybody have any ideas which chips I should check to fix the dark lines see pictures. I have several non working boards that I can swap chips from.

That looks like the raster lines is the problem and not the chips but a monitor guy needs to confirm this.

If it is what I think the problem is you need to turn down the flyback on the monitor chassis.
 
Its not the monitor. The lines start at the horizon and are only on the ground and track and move with the speed of the car. If the car in is not moving the lines don't move.
 
Well... poop. I was hoping it'd be something easy to just point at and go "ah-ha!" but... nope.

It looks like it's effecting the road and the grass, but not the cars or the red/white stripes down the side of the road.

Does anyone know if the RAM test in the test screen actually tests all the RAM or does it skip some of the video RAM like the 6116's at 3E, 3F, 4E, and 4F?
 
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