Well, I waited awhile in hopes of getting a response to my post (#795) but it would appear that there is not much activity in this thread. I went ahead and removed the main board, sent it to the Ebay repair shop, and for $70 plus the cost of my shipping it to them, they weaved their magic spells and fixed it. I installed it tonight and the TV (Pioneer PDP-5080HD) works like new.
I told the TV Guide to NEVER remind me but could not figure out how to both tell it to never remind me and to set the zip as 00000 so I just did the former. I hope that this will work.
If anyone knows of a way to both tell it to never remind me and to set the zip to 00000, please post in here.