65uf6800 tv comes on has snowy picture on all inputs
The LG 65UF6800 tv goes on and the menu and sound work fine, but the actual picture on the screen on any input is all snowy.
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@fivestar9211 @roy_r if you checked all the inputs with different source and if your menu is clear but your screen is snowy, you are having problems with the main board.
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I would suggest that the main board is your problem. As this unit is very warm during use and cools when shut down.The solder will expand and contract. This will produce poor grounds on all the HDMI connections, HDMI M1, HDMI 2, HDMI 3 and so on.One thing to try before you make a new board purchase try this. LVDS cables……….there should be two of these. Making for four connections. They are ribbon cables from power supply to main board. Carefully lift up the plastic connections, pull ribbon out and clean the connection with a clean pencil eraser. Ribbon and board connection, replace ribbon on each account. Thank you for asking, Matt of Martins TV Repair.
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I fixed this issue on LG 49UF6490 with the replacement on Main Board. I want to update anybody on my learning. The main board for LG 49UF6490 and LG 49UF6430 are interchangeable. Also the TCON boards of LG 49UF6490, LG 49UF6430 and LG 55UF6450 are interchangeable.
I’m having an issue with snow when I connect my hdmi into my 55uh6450 so do you think it is the tcon board or main
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Try these options it should work for you.
Turn off the digital noise reduction feature on the television.
Turn off auto motion .
Try changing picture modes, also see picture\color settings and turn off adaptive lighting from the settings .
and other possible reason could be wrong settings, electrical distortion or glare on the screen.
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Bad grounds on any video cable will cause this. You may have a problem with the cable / satellite box. You may have video connections crossed. Just trouble shooting. Check cables……I do believe that is a good place to start. Matt of Martins TV Repair.
Update (11/24/2020)
HDMI grounds on the board are possibly cracked. There is a tremendous amount of heat on these.
As they cool they contract, when hot they expand, leaving bad grounds down the road. I have heard putting the board on a piece of cardboard into a preheated oven at per se 400 degrees for ten minutes then take out and cool for a couple hours. You will have to babysit and not burn this.
Thanks for asking, Matt Of Martins TV Repair.
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Have a lg 55uf6430 and was watching regular tv and it went to all gray with sound still any help all imputs the same and menu is clear
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We are sure the main board is bad, we replaced many of those but now
those board s are not chip, it must be a way to fix those, any suggestion ?
we already tried reheat the main processor but still the same.
Update (11/24/2020)
replace the main board for sure will fix it.
but we did not have time to pinpoint the issue with main board itself, I am sure is fixable
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The video you’re playing is it on HDMI?
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All HDMI and internal apps,
basically the video is bad but on screen display is ok
@kami electronics bad main board (most likely the video processing IC). You can try a reflow and see if that changes anything.
Video Processor is fine Because the Tv menu is ok
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it may possibly be the main board, solder overtime will expand and contract and this will cause a bad ground.
i would certainly see if your tv box should be rebooted or replaced. and of course check your hdmi/rca and coaxil chords, before you invest in a main board.
thanks for asking, matt of martin's tv repair
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Thank you. Can we resolder the ground to fix it? If yes, which one?
8 comentarios
@fivestar9211 post some images of what your screen shows with your question. That way we can see what you see. Use this guide Agregar imágenes a una pregunta existente for that. Is your onboard menu clear? You've checked all inputs (Coax, composite, component, HDMI) and they are all snowy? Did you disconnect everything that is connected to your TV (other than the inputs)? What have you checked?
- de oldturkey03
I have that issue....all inputs are snowy but menu is crystal clear...what is wrong?
- de Tom K.
yes thats exactly what it does
- de DuJuan W Walker
New LG 55C8 is mildly snowy for all apps, Netflix, CBS All Access, etc. Broadcast TV is fine. I don’t want to return if of there’s a fix out there.
- de Ben Dobbeck
I fixed this issue on LG 49UF6490 with the replacement on Main Board. I want to update anybody on my learning. The main board for LG 49UF6490 and LG 49UF6430 are interchangeable. Also the TCON boards of LG 49UF6490, LG 49UF6430 and LG 55UF6450 are interchangeable.
- de Debarsish
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