2019 LG 55 inch TV model 55UK6090PUA sound only. No video - Videokarma.org TV - Video

pac.attack76 · #1 05-16-2022, 07:49 PM

Tv turns on with sound but no video. Backlight working.

damen · #2 05-16-2022, 08:55 PM

If there are at least 2 ribbon cables going from the T-con board to the screen, try disconnecting them one at a time and see if you then get 1/2 picture when you turn on the set.

pac.attack76 · #3 05-16-2022, 08:57 PM

Quote:

Originally Posted by damen

If there are at least 2 ribbon cables going from the T-con board to the screen, try disconnecting them one at a time and see if you then get 1/2 picture when you turn on the set.

I'll try it and let you know.

pac.attack76 · #4 09-04-2022, 01:17 PM

Going to open it up today and check it out. Will post what I find in a few hours.

pac.attack76 · #5 09-04-2022, 01:52 PM

2 cables run to the screen. Removed one and got this:

kf4rca · #6 09-05-2022, 07:07 AM

There was a 50+ set in the dumpster at the free public recycling bin yesterday.
(The guy who runs the place really just likes computer stuff- presumably for gold harvesting.) He throws the TV's away!
I couldn't get it out. I was thinking, where are you guys when I need you!
Ha Ha.

vortalexfan · #7 09-06-2022, 05:41 AM

Quote:

Originally Posted by pac.attack76

2 cables run to the screen. Removed one and got this:

It looks like you might have a bad board or two, someone once gave me a 55" LG Plasma 3D Smart TV that would give a blank screen when powered up, and it turned out to be a bad board, I replaced it with one someone was selling on eBay that was parted out of a working set that someone broke the screen on (with a Wii controller) and its been working fine since then.

kf4rca · #8 11-20-2022, 07:08 AM

Do you have a vcr that you could connect to the A/V inputs to get sound?
You might be stuck on A/V inputs.
There is also a part 2 to the advance troubleshooting techniques:
https://pdfcoffee.com/qdownload/lcd-...-pdf-free.html

pac.attack76 · #9 11-20-2022, 11:10 AM

I have numerous ways of connecting to av inputs. I was using the remote changing modes but didn't get anything

kf4rca · #10 11-21-2022, 08:20 AM

You should be able to get audio either off air or thru A/V jacks.
I'm assuming all your PS voltages are there.
I think you have a main board failure or EEPROM corruption.
Did you read thru the Part 2 download link I sent you? There are some items that I think address your model.

pac.attack76 · #11 11-23-2022, 10:22 AM

Yes, I'm gonna perform one more test, then I'm gonna replace the board and see what happens.