The picture will drop out ever 3-5 minutes to a black screen for about 30sec before coming back. After closer inspection the picture is drops out to about 98% (so very faint image) then to full black. Pulled the TV apart and there are no components blown up or obviously smoked. What component would be causing this? How and what should I be testing? Is this more likely the backlight inverter or the backlight itself? Your help is very much appreciated!
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.
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