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I have a Joust here. Gameplay is great, sound is great. There's something wrong with the color... There is no "red". Red exists, but not where it should. There is no lava under the bridge, the red knights have no color, player one knight is white, should be yellow - the red isn't filled in on the title screen, weird stuff like that.

There's a g07 in it, and looks great with a TPG - everything works as expected (worth noting I'm using the same cable on the TPG for the monitor to mainboard, so I don't believe it's the cable)
From the self test:
1718414904010.png
1718414939881.png

with the TPG:
1718415772348.png

So, cracking the manual open...
1718415213252.png

I've probed out 1A, 1B, 2B and 2C. I've also piggybacked new IC's, no change.
The 3 2N4403 seem fine.
I've followed the line back to the 7410 at 4L and 4M, and I think they're ok too - at least, they're both behaving the same way.

Anyone seen this before? Any ideas?
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