Technician came out and was measuring the voltages on the secondary power supply board( I think that is what he called it ). The " Ve " would not measure. He isulated that card from the x-main and then it would read the correct voltage ( 100 ). When he pluged the x-main back in the voltage would not read again on " Ve". So we think it is the x-main board which by the way is running real cool to the touch. The y-main was running hot to the touch as he said it should. My question is what does the x-main board controll ? What are the symptoms of a bad x-main? I wanted to make sure with the forum guru's before going on a wild board chase LOL. My tv symptoms are still black screen at start up , take forever for the pixels to start to light up , dark horizontal band that takes up 80% of screen. You can see the picture but it is real snowy and it looks like there is a dirty overlay in front of it.
Thanks very any input