Check and replace damaged component/s at it main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Viewing it in "
Mosaic" or "
Magazine" will make surf easy. Surf the site with patience. Pull up older posts.
Do asearch by type in the brand name of your device at its search box.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis.
first of all thanks so much for replying. The TV has no picture at all or sound. all my boards are made by LG. thanks again for your help.
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