Ms Pac weird color error

Zoma

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Kyle, TX, Texas
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We recently picked up an original Ms Pac and everything worked pretty much flawlessly... minus the display. We sat and adjusted it for about 30 minutes before finally returning the game to normalcy... except Pinky and Sue are the same tint of orange-pink and no matter how we adjust it seems like they will not stop being the same color. I WAS about to post this in monitor issues, but I am pretty sure this is an issue with the board itself. Any idea what chip this could be, or possibly something I can do to fix the problem?

EDIT: Thanks for the tip. As it turns out this WAS a monitor issue. We'll probably start with a cap kit. Thank you though!
 
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Pull and reseat the color proms 4A & 7F. Also check the row of resistors in row 7 for damage, shorts or broke traces. I have never come across that issue but thats where I would start. Pull up the schematics and work your way back from those resistors.
 
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