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-   -   Samsung UN70NU6070 TV Issue - HELP! (https://www.badcaps.net/forum/showthread.php?t=97290)

Djgh 07-12-2021 05:15 AM

Samsung UN70NU6070 TV Issue - HELP!
 
1 Attachment(s)
Evening,

I started experiencing color/brightness issues with my 70Ē Samsung tv after a year or so from date of purchase. It doesnít seem as bright and the colors are a little off. Is this a backlight issue or something else? Iím pretty hands on, so I donít mind tackling the issue if I can pinpoint what it is.

Any help would be appreciated.

Model #: UN70NU6070

Video comparison:
https://youtu.be/6dNhwNy_lus

alfatv 07-12-2021 09:03 AM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
Yes, it could be backlight. Did you you run it at 100%?
In the meantime you can change color temperature setting in user menu and tune white balance in service menu. Reduce backlight to minimum possible setting.
For best results run the test with fully white screen.
If white is good, you can play with tint setting for colors, but better set it in the middle.

Djgh 07-12-2021 09:43 AM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
Quote:

Originally Posted by alfatv (Post 1058230)
Yes, it could be backlight. Did you you run it at 100%?
In the meantime you can change color temperature setting in user menu and tune white balance in service menu. Reduce backlight to minimum possible setting.
For best results run the test with fully white screen.
If white is good, you can play with tint setting for colors, but better set it in the middle.

Appreciate it the advice. Iíve played with all the settings, performed a picture and power reset, and even spoke with a Samsung representative. None of those were helpful. I may end up replacing the backlight due to it being inexpensive but was still hoping someone could pinpoint the exact issue.

R_J 07-12-2021 09:07 PM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
It is unlikely to be the backlight, I would first check the source, possible bad hdmi cable? The next thing I would check (reseat) is the LVDS cable between the main board and t-con.

ducky29 07-13-2021 12:38 AM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
Change the picture settings to vivid or standard. See if that makes any difference.

Djgh 07-13-2021 05:39 AM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
Quote:

Originally Posted by R_J (Post 1058330)
It is unlikely to be the backlight, I would first check the source, possible bad hdmi cable? The next thing I would check (reseat) is the LVDS cable between the main board and t-con.

Ordered a new tcon board so letís see what happens.

Quote:

Originally Posted by ducky29 (Post 1058352)
Change the picture settings to vivid or standard. See if that makes any difference.

Lol thanks for your Input.

mmartell 07-13-2021 07:25 AM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
Probably a gamma issue on the tcon. Think you're on the right track.

dick_barton 07-13-2021 12:14 PM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
Quote:

Originally Posted by mmartell (Post 1058396)
Probably a gamma issue on the tcon. Think you're on the right track.

+1
It does look as though the black level is washed out.

alfatv 07-14-2021 11:02 PM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
Can you go this site and post pictures of gradients white red green blue?
https://www.eizo.be/monitor-test/

Djgh 07-16-2021 06:05 PM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
Replaced the tcon board. Itís definitely better but not perfect, then again Iím comparing it to the picture on my iPhone. Itís still a little saturated (maybe thatís the word)

Djgh 07-16-2021 07:56 PM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
People’s faces look like they have a bad tan

R_J 07-17-2021 10:14 AM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
Do you have pictures of both t-con boards? it is possible they could be for different models. You can't always go by the BNxx-xxxxxx number you need to use the number on the white sticker. I suspect there is an eeprom on the board and it bight be programmed for a different panel or main board

Djgh 07-19-2021 06:36 AM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
Quote:

Originally Posted by R_J (Post 1059316)
Do you have pictures of both t-con boards? it is possible they could be for different models. You can't always go by the BNxx-xxxxxx number you need to use the number on the white sticker. I suspect there is an eeprom on the board and it bight be programmed for a different panel or main board

Not anymore. Old board is long gone but I purchased the new board based off the sticker on the back.

Djgh 07-24-2021 12:18 PM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
Another thing I noticed is that when I first turn the tv on, the colors appear to be perfect but slowly goes back to its original color issue

frannyjunk 07-24-2021 08:19 PM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
Could be the backlights. The phosporous on some of the LEDs may be failing causing a shift towards blue/purple (or pink before it gets to blue/purple).

Djgh 07-26-2021 08:10 AM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
Quote:

Originally Posted by frannyjunk (Post 1060639)
Could be the backlights. The phosporous on some of the LEDs may be failing causing a shift towards blue/purple (or pink before it gets to blue/purple).

The led strips could cause the color discrepancy? Am I wrong to assume the leds only assisted in fixing dark spots on the screen.

ducky29 07-27-2021 03:46 PM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
Yes they do but I have never found a samsung with that fault. Mostly vestels and LG. The picture will get blueish but I don't think this is the case.

petehall347 07-27-2021 04:01 PM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
turn the red up and see what happens

Davi.p 07-28-2021 05:47 AM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
Much probably bad backlight, must check power supply output tensions for the leds, must be in the range, if not it can ruin the led phosphors by too much tension. If those are ok so are bad leds.

angelos 07-28-2021 06:40 AM

Re: Samsung UN70NU6070 TV Issue - HELP!
 
Quote:

Originally Posted by frannyjunk (Post 1060639)
Could be the backlights. The phosporous on some of the LEDs may be failing causing a shift towards blue/purple (or pink before it gets to blue/purple).

+1
I totally agree with that.


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