I am experiencing problems with my big screen tv. I have no picture, when I turn the power on I see a red screen for about 3 seconds then it cuts off. So I just have a blank black screen. I had a service technician take a look and he says it looks like the video output circuit needs to be replaced. He says it cost about $325 to get that replaced. If this is not the problem then it is the tube, and this can be very costly to replace. Any suggestions? Is this worth replacing? Is that a normal price for that kind of repair? Please help. Thanks