"Slight" problem with Pole Position background (picture attached).

rmcelwee

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"Slight" problem with Pole Position background (picture attached).

I have a PP1 video pcb that has a problem with the background (a strip going across maybe the 1st inch of the top half of the screen). I think it is a color issue but I really don't know. The manual shows the background graphics are controlled by the 2732 eprom @ 6N. I see it is connected to a LS273 @ 6M and an Atari custom 02 chip @ 8N. My logic probe shows pulsing on the appropriate pins on all three chips (as well as chip 5K). I burned another 6N and it did not help.

The first picture is from my board (you can kind of see the missing mountains - I think it is just the colors are off). The second picture is what it should look like.

Any ideas?
 

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