Thanks michaelbm, i think you are right on.
I pulled the thing apart again and my fix was un-fixed.
I had to re-rig the wires and superglue them in so the tension of putting the front back on wouldn't pull them back out - the wires are a hair shorter than they should be.
Everything works but the display has the dark area.
I don't really want to un-solder & re-solder the bulbs, I would end up junking the thing. I will have to live with it or get a different unit.
Any idea if the multi disc unit fits in the dash, or is this another unit to plug into. I have a 99 denalli with the 6 disc in the center console. same thing?
Also curious if any of the factory units have the aux. plug. This would make a trip to the junkyard worth it.