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Mahjong Sisters - Bizarre color problem

dos

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I got this tittyjong game in:

yhopdYQ.jpg


Using it with a Pana MP-92. During the attract mode, the title screen and high score table appear normal:

z9J1kAX.jpg

Mc7jiGO.jpg


Once the attract mode goes into demo play, or a game is started, the main game screen (and only the main game screen) is missing either R, G, or B depending on the girl.

WHUgVxR.jpg

Missing blue

dDesvTg.jpg

Missing green

Aside from this, everything seems to be perfect. Voltages are good, but my mahjong harness is missing the extra +5V and GND lines specified in the manual (37-44 in this image):

GqT7QJx.jpg


I'm pretty new to jong boards, anyone know if these lines are essential? Just about every mahjong manual I can find has them populated, but the harness shipped with the MP-92 is missing them from the factory. Anywhere to start looking for the cause of the missing colors?
 
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