hi all, my first time here. I have a vizio p42hd plasma TV that came in dead. after i repaired the power supply, when plugged in and press the power switch, the z-sus heat sink would get warm but the y-sus would stay cold. testing showed blown fuse on the y-sus. all P.S. voltages were spot on so I replaced the y-sus. after replacing the y-sus, the tv will power on, with led going from amber to green, screen lights up for a few seconds then goes faint with no video, no graphics. now the z-sus and the y-sus heat sinks stay cold. all the voltages are still spot on. the service manual says to replace the graphics board, (which i have done 2 times), and if that doesn't correct the problem it is a bad panel. is the service manual right, even with a panel that lights up? I have checked the voltages on the power supply over and over, i have replaced the graphics board, the z-sus and y-sus and the left and right buffers. of course all the replacements were supposed to be from working tv's with damaged panels. I do not have a lot of experience with plasmas and i would like to know if a panel can light up with the z-sus and y-sus heat sinks remain cold and have a defective panel? i really could use any help anyone can offer. thank you in advance
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