Toshiba 40" 40G300u1 First the picture starts flickering. So I do a firmware update. Now it work but go black every so often. So after googling and youtube I realize it still has a picture but very faint. Turn it off and back on. It works for 20 min or so then black again. Took the back off and took out the inverter, put it back now it seams to work, for now. I think the inverter is goin out or the back light. Any ideas?