[H] TV BIOS

[Winterlight]

I have a friend with a old TV, I think a Panasonic, one of those with 
a built in VHS DVD player deal. I think it has a corrupt clock BIOS. 
It keeps turning off after a few minutes of play, and then it will 
turn on by itself in the middle of the night. It must be the sleep / 
alarm feature is corrupt. Is there a way to reset a BIOS on a TV. I 
have tried unplugging and letting it sit for a few days but that 
didn't help. Anybody know if there is a trick to reset a TV BIOS?