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www.youtube.com/watch?v=PWoz_-3OHIMJan 25, 2013 - Uploaded by Tampatec
I have a LG 42PM4700-UB plasma tv that just went black. The red power .... I have a RCA 32 inch it has no sound or picture !Just a light blue ...
Ur tv the LCD inverter board it dead.The LCD inverter is the board that help the LCD screen panel to get a backlight to produce a picture,the LCD inverter board is dead and it not working anymore that why u only get 8 sec.of the picture.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish LCD inverter board for the replacement.It a long board in shape.
sounds like your picture bulb has blown!! not good they are very pricey!@ they only have so many hours so turn the tv off when you are not watching hope this elps ,, good luck!
do this test, turn tv on and touch the screen if you can see light in the background it is the panel if no back light is present then it is the power board.
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