Well, I installed two brand-new fans this afternoon, and the TV booted right up into the scrambled picture this time instead of 45+ minutes later. I guess it is time to give up and move on to a modern TV.
So, if there is anyone else on here still running one, or trying to, I have spare parts! Let me know soon if you have any interest in any part of the carcass.
New-ish OEM bulb that I bought December 2014 and it is working flawlessly (with a generic housing from my first bulb purchase)
Well-used original OEM bulb in the factory housing (I saved for emergency spare in case one quit suddenly)
Two brand-new cooling fans with <5 minutes of run time. (I moved the OEM connectors over)
Two OEM cooling fans
Power supply assembly (3 boards in a chassis)
Light engine/DLP assembly (I'm pretty sure this is the problem child)
screws, front door, screen, whatever else you might need!
I know there isn't a lot of value in these parts any longer, but hopefully they can help someone keep a set going. Make me a reasonable offer that will make it worth my time to box anything up and keep the bits from getting scrapped. If I don't get any traction here, I'll probably make an ebay listing for the bulbs and housings, and see if I can catch any interest there for the rest of the parts.
I'm sure sorry to see it go. It has been a great TV for 9 years.