After about 10 min. screen goes blank like power goes out on LCD tv. What causes this to happen?

This issue is most likely caused by a capasitor doing bad. There is no easy fix. It must be disembled and the power supply repaired. If done properly, it should cost somewhere between $ 50 to $125. But it may do it again as the Pwoer supply is a known issue for this monitor. Sorry.

This does not seem to be a power supply issue but rather an issue with the backlight inverter board. When the screen goes black, take a flash light and focus it on the screen from a close distance and several angles. See if you notice a very faint image. Try changing the channels to make it more noticeable. Try it and let me know

when the TV goes dark, shine a flash light on the screen- hold it very close.
if you see a little bit of the image, your backlight has failed. That would mean you would need to replace the LCD panel.

This is happen due to power problem please check your power connection due to power fluctuation its happen.

Hi

Please remove the power cord of the TV, if it is connected to any power surge box and connect it directly to wall jack or wall outlet. Do not place any magnetic items nearby the TV. Do not completely cover the LCD with plastic cover or cloth.

This should resolve the issue.

You will either have a fault with the inverter board which drives the backlights or a faulty backlight in the screen. If the problem is a backlight then a replacement screen is the only cure. One or the other is breaking down after it has been opn for a certain period of time, have an engineer call out & check with a tester if it is a screen problem.

It can be the backlight inverter board is going out or the power supply that supplys the power to the inverter board is going out if what you mean by 'BLANK' no light on the screen. Look for bad capacitors in the power supply first it is easier to get to than the inverter board.
http://en.wikipedia.org/wiki/Capacitor_plague

If you haven't yet I would replace the lamp. The mecury lamps are the first suspect in these cases.

Most of you that are having problems,it has nothing to do with your screens themselves,but with the capacitors in the power supply,the caps,over heat and the tops pop out and the dry out and are no longer any good,a soldering iron,solder,and flux are really all that is needed to repair this problem,get good caps at radio shack,or equal location,pay attention to polarity on the two contacts on the bottom of the caps,replace all that are poped up