LG 47LB5900-UV TV display is flashing / flickering on and off
I have a LG TV 47LB5900-UV, which is about 1.5 years old and the screen suddenly started flickering on an off. I was watching TV on it and suddenly the display just went off, the flashed on then back off. At this point the display is primarily off, but flashes on for half a second, then back off. This is happening with the initial screen, on screen menu, and with any input. I opened the back and reseated the internal cables between the 3 boards, but the issue remains. The connectors on each cable are somewhat recessed, so I am not sure of a good way to clean them.
The TV doesn't seem to be completely powering on and off, just the screen is flashing on/off. Whatever is would normally be displayed is just flashing on briefly until I turn the TV off.
Please advise how to test and further isolate to which component should be replaced.
Tcon? Power board? Main board? Cable?
Is this a good question?
I have the same exact problem. Replaced TCON but still the problem remains. Any updates from you? May just call the service tech
It sounds like a back light or power supply/ LED driver board problem. Look for bulging capacitors on the power supply board. If they all look ok, check connections on the back of the power supply board and the LED driver board if it is not part of the power supply board. Some models combine the two on one board.
post some images of your boards with your question. that way we can see what you see. Use this guide Adding images to an existing question for that
i whas heving the same problem i did replace caps on the power sepply after replace the caps my screen whas getting verry hot what can that be
the ratting on the caps whas 10v 3300uf and i have replace that caps with 10v 2200uf can it be the caps of me
Had same prob lg 50 smart TVs. Take back off to undo all connectors and check for little strands of glue stuck between connectors easy fix never had a problem since. Before was flickering all the time half a picture or coming on with sound onlyand now works great
by Wayne Mcgun
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