LG led 65 smart tv picture fine no sound sometimes static

Question edited for clarity.
Question moved to LG Television.

Unusual error. Claim on Warranty? Ask about the blink code? Explains here sort of 'channel 5 error - power supply'

https://www.lg.com/eg_en/support/product-help/CT20124052-20151654379071

LG 65LB7100.ACCT Product Support :Manuals, Warranty ...

https://www.lg.com > Home > Support Home
Locate model and serial numbers on LG TV: LOCATING MODEL / SERIAL NUMBERS ON LG TELEVISIONS The model / serial number label tag identifying each specific LG ...

Without getting all technical your LED backlights are bad, the part of unhooking one ribbon cable and not having the repeated cycle would be normal in this model set.

LG LED TV has no picture (black screen) but still has sound - can ...

www.tomsguide.com/answers/id-2660992/led-picture-black-screen-sound-fixed.html

Feb 9, 2017 - My 32' LG LED TV has suddenly lost picture! The sound is alright but the screen is pitch black. ... Then completely black but with audio. ... I'm really hoping if I do the right research Ican fix this tv for my husband. .... Take the screen off hit power and watch LEDs if any don't flash its LEDs if they all flash its ..

hi check the led driver board for dry joints, what is the voltage you tested, my guess is the led in the panel has shorted out, thanks

shaun

Hi!


Check your power amp circuit. Or, check if it is feed by the power supply circuit. Good luck,


Serge.

The tcon board or the LCD panel is faulty . Can confirm by replacing the TCON Board .
If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/

If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
http://electrotechnician.blogspot.com/

Check and replace the back-light LED strip. Contact any service technician. http://electronicshelponline.blogspot.com/

Here is what to check when your TV is turned on, power light is ON, but no picture is seen or sound is heard:

1 - Be sure the component you are using (Xbox, Cable, SAT, ROKU) is turned ON.
2 - Check to be sure all cable and cords are securely connected to the TV inputs and component outputs.
3 - Make sure you are on the correct input as some TV's will show a black screen if there is nothing connected to that input.
4 - Unplug the input you are trying to use from the TV (such as an HDMI Cable) and plug it back in.
5 - Check for signs of damage on all cords and cables from the TV to all components.
6 - Make sure the TV is not in ENERGY SAVE MODE, press the button on the remote control to go back to normal mode.
7 - Unplug the TV for 10 minutes to see if there was a temporary one time issue with the TV.
8 - Disconnect the TV from power for 2 minutes, then when plugging it back in PRESS AND HOLD THE POWER BUTTON ON THE TV FOR 10 to 20 SECONDS to try and force the TV to reset.
9 - If after checking all these different issues, you may have a Faulty Power Supply Board, A Bad Capacitor on the Power Supply Board, Loose Wire Harness, or Loose Ribbon Connector in the TV itself.
10 - Most likely when a TV has the power light ON but NO PICTURE and NO SOUND, it is the Power Supply Board that has failed.

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Take it back