Re: LG 55 UF6450-UA tv no audio,Flickering screen intermittent, not turning on.

Thank you for your response. What connection would you check in the backlight circuit? Do you think a component on the Display board is defective? (Picture attached )
I requested another set of LED strips under the warranty waiting for the parts & hoping that will fix my problem.
Thanks again for your advice....

Re: LG 55 UF6450-AU tv no audio,Flickering screen intermittent, not turning on.

Posted copy

Re: LG 55 UF6450-AU tv no audio,Flickering screen intermittent, not turning on.

In search of a schematic LG 55 UF6450-UA

Re: LG 55 UF6450-AU tv no audio,Flickering screen intermittent, not turning on.

Update : I received the main board back from repair installed it and still the TV flickers on the when I turn it on but now the tv has a display on the screen of LG and displays flickers. The main board now has two red leds lit one on the right side of the board and the other is the audio connector.
I order a power supply board since my power supply board making a buzzing noise sound like its coming from the transformer. Installed it today did not stop the flicking when I tuned it on.
I...

Re: LG 55 UF6450-AU tv no audio,Flickering screen intermittent, not turning on.

Replaced both 60 led bottom edge strips.part # 1536 WN6419 5 E 6916L2319A,
1538 WN64195E 6916L2318A. Shopjimmy.
Turned on Tv still flashing no display. Voltages at led connector.+155.6 v, -24.5 v, + 332 v, -3.5 v.
Voltages at power supply connector p201 pin 1 3.36, pin 2 1.74,pin 3 0 Grd, pin4 13.28, pin 5 13.28, pin 6 13.28, pin 7 13.28, pin 8 13.28, pin 9 0 Grd, pin 10 0 Grd, pin 11 13.46, pin 12 1.74.
I think it might be the Mainboard ...Sending it out Mainboard for r...

Re: LG 55 UF6450-AU tv no audio,Flickering screen intermittent, not turning on.

Thank you for the advice..I will do my research on the led circuit and try to move forward on my repair.

I have a Lg 55 uf6450-UA tv with no audio, no display, a flickering screen with a red light that blinking 3 times on the display when I power the unit on. This occurs temporarily when the tv has been unplugged for a while. The voltages on the power supply board at this time on p201 connector -pin1-3.3vdc pwr-on, pin 3-0 Grd, pin 5- 13.2,vdc pin 7-13.2vdc
pin 9-0v Gnd, pin 11-3.4vdc. All the readings are steady on the connector.
At the Test point 13.2v a steady 13.2vdcvolts. The voltages at P 801 the Led connector read LED+ 154vdc, LED-23vdc, led+ 319-346vdc not steady, led- 0v. I...

Re: New Members - please post your introductions here

Hi,
Just joined this forum and would like to improve my troubleshooting skills.
Thank you,