John,
The actual display itself may be just fine, and it could be that just a chip or two has fried. What leads me to this conclusion is that not only is the display dead, but the auxiliary video output is dead as well. There is a video board, but I don't recall exactly where it is located. If you have access to the block diagram and associated schematics you can find the video card and its part number.
Gary

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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)