I have a Insignia NS-LCD26F. After running for about 10 minutes it will shut off . Let it sit for about 20 seconds hit the power button and it will come back on for about 10 minutes again and then shut off. I,am being told these tv's have a power supply problem. Saying that I would like to get a hold of a power supply or better yet a schematic . If someone could get back to me I would appreciate it