After putting in a second screen, I cranked up the controls on the front panel and the screen lasted maybe 5 minutes...dead to an all white screen after a reboot...this was the same issue with the first screen. So I think some problem on the motherboard or inverter board is killing these lcd's ? Has anyone seen this? These Toshiba screens are getting rare and not cheap.

On the first one, I disassembled the computer down to the motherboard and the screen seemed to momentarily come back. So I know that sounds like a loose cable but it's hard to believe because this seems to be initiated by cranking up the contrast and brightness to max...then it's just permanently white.