Question about Samsung HP-R4252 42 in. Plasma HDTV

Pn42b450b1dxza has no picture sound ok what is my problem

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Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
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