Panasonic Plasma TV, TH-42PX60U, strange issue with picture

[lordultima]

PanasonicTV, TH-42PX60U turns on as it normally would with picture and audio displaying correctly. After 30-60 minutes of watching TV, the screen goes dark with audio/sound working.
I don't have a voltmeter to check the voltages and that's why I thought I'd ask before if anyone knew what would could be causing it. I pulled the back cover and removed as much dust fom the boards and the vents as well. The backlight seems to be working properly because the TV turns on and a picture displays on the screen. Any suggestions would be helpful.

I took some pictures of the back with close ups of some of the boards maybe someone might notice something.

Thanks!

[dick_barton]

Re: Panasonic Plasma TV, TH-42PX60U, strange issue with picture

I would certainly start by clearing all the dust from the circuit boards and especially around the fans and then see how long it stays on.