![]() You can unplug the back lights connector from the power supply board. I will try and test the output of that side of the power supply it probably got taken out also. I connected the back light tester to the other back light input and the tester staarted slowly increasing then started jumping from 130 to 180 to 160 to 205 volts and the lights did not come on. I connected a Back light tester to one back light tinput and the tester slowel increased voltage to 164 volts and the back light s came on. There are 2 sets of back light voltages going to the plug. ![]() I took back off and removed the back light plug from the power supply. #Chandu name stayle how toPlease advise how to test and further isolate to which component should be replaced. Whatever is would normally be displayed is just flashing on briefly until I turn the TV off. The TV doesn't seem to be completely powering on and off, just the screen is flashing on/off. The connectors on each cable are somewhat recessed, so I am not sure of a good way to clean them. I opened the back and reseated the internal cables between the 3 boards, but the issue remains. This is happening with the initial screen, on screen menu, and with any input. At this point the display is primarily off, but flashes on for half a second, then back off. I was watching TV on it and suddenly the display just went off, the flashed on then back off. ![]() I have a LG TV 47LB5900-UV, which is about 1.5 years old and the screen suddenly started flickering on an off. 5 years old and the screen suddenly started flickering on an off. I have a LG TV 47LB5900-UV, which is about 1. ![]()
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