No picture, but have sound. No back light but have image on screen using a flashlight.
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.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.
Testimonial: "I could not find any information on the website you suggested about power supply board BN44-00664A. I believe that the back-light inverter is part of the power supply. I'm not sure if I should have voltage to both pairs of wires coming from power supply to the LED's (D+ & D-, S+ & S-)? I only have voltage coming from the "D" pair."
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