Thank you for posting your question on Just Answer! I will be happy to help you with this problem. Can you please give us some more information so I can better answer your questions.
-Did you replace the board for this issue or just in the past for other issues?
-How old is the unit?
- Do you have this problem while watching all different devices hooked to this television? (DVD player, cable, satellite, game counsel, ect.)
Please give me this information and I will be happy to assist you further.
Ok do you see the LVDS cable? Its the cable between the main board and the TCON board which is the board at the top center of the screen. Turn the tv on, and then while it is on unplug and plug that cable back in, does anything happen to the screen while you do that?
Do you know how to use a meter?
What is the DC voltage feeding the inverter board?