Have replaced Power Supply AND LED Driver Board with online used boards. No change. I have audio and can see image with flashlight but no backlight. LED Strips???? ALL OF THEM??? Possible T-Con board? Suggestions??
You have some bad LED lamps in the panel, its not a fun job to get at them and change them but if you watch a couple vids it should give you an idea how to do it, other issue is cost as the light strips can be expensive depending on the set and its size...Good luck!!
SOURCE: LG 50la6970 no backlight i have sound and dark images!
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.
SOURCE: LG 47LN5750 No picture
If you have backlights its not going to be the tcon for future reference. you have some shorted or open LEDs in the panel. Check the voltage going to the LED sets, should be 100 plus volts
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