Toshiba 46L5200U screen turns off, after a couple of hours

[tibimakai]

I have picked up this (LED)TV, with this issue.
Did a firmware update and left it to run, for hours and then the screen went black, but sound was still playing.
I have not opened it yet.
What should I look for, in this case? Something overheats? Bad capacitor?
Any help would be appreciated.

[mmartell]

Re: Toshiba 46L5200U screen turns off, after a couple of hours

I have a Toshiba here (40E200U) that randomly refuses to turn on. Works perfect until then. These things appear to have crappy bga joints under the main ic on the main board - heating it up brings it back to life but on mine I tried to repair it and killed it.