External monitors have bad picture

I have a 20" ACD hooked up to my PB. The other day the picture suddenly had a pink and blue tint to everything and colors flicker on white backgrounds. Additionally, pictures are very saturated with red and blue. I hooked the display up to a friend's MBP, and it was fine. That leaves my PB as the culprit (or the mini-DVI-->DVI adaptor?). My PB's LCD is fine. It does not show up on screen shots. Any ideas on what my problem is?

One last stab at this....
I took my PB into an Apple retailer and we tried other digital displays and a different mini-DVI adaptor with the same result each time. The tech there concluded it was the logic board, which would mean my PB is done doubling as a desktop. If anyone has a different opinion or other suggestions, please post.

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