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.
http://electro-medical.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.
SOURCE: My 32av502r television will turn
Your back lite lamps are not lighting, sounds like your high voltage power supply is kaput. check out this You Tube video http://www.youtube.com/watch?v=6XoF6QZ1dmw
SOURCE: lg 42lg50 LCD tv has audio but no picture
The backlight is out most likely caused by either the T conn or the Invertor. The invertor is most likely you can get replacement boards from www.tvcircuitboards.com leave a email if your not sure what you need.
SOURCE: Samsung LN32c350 sound but no picture
Likely there isn't anything you can do on your own at home short of increasing the brightness through the menu. You probably have a bad IC that will have to be replaced by a technicion
SOURCE: Westinghouse. Why no sound, no picture?
Verify that the voltages produced by the power supply board are present. Use a voltmeter to do this. The voltages printed on the board next to the connector cable should be very close . If it's way off or not present at all, then the power supply board is the problem.
SOURCE: how do i fix a sound, but no picture led tv?
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.
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