In article .com,
says...
I have a Philips/Magnavox PTV770-AH01 Series Projection TV that we
recently moved to a different house. since we moved it, it turned on
for about 5 minutes and then shutdown and will not power back on.

These sets have a lot of circuits that will cause shutdown,
many of them associated with protecting the CRT phosphors.

Loss of vertical scan is one of the more common causes.
The vertical IC's tend to develop cracked solder joints,
and moving might have exacerbated it.

Or moving might have ruptured a CRT diaphragm and leaked
coolant on the PC board, which can be very bad news.

Lots of possibilities...