How to stop LG TV from auto-brightning and dimming. - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 27 Old 02-21-2017, 07:43 PM - Thread Starter
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Unhappy How to stop LG TV from auto-brightning and dimming.

Hiya guys, I'm having this issue with my LG 55uh9060 TV, It continuously brightens the picture till it loses color and the color starts looking dull it's especially noticable with 2D animated shows and also dims the picture at times, I've turned off every dynamic setting and went as far as to go into the service menu to turn off dimming yet it still happens, it happens more actually. Due to my OCD this has taken over my life, quality and audio-wise this TV is great, but no matter how much a calibrate, the random brightning and dimming completely obliterates the colors and contrast.

So please if anyone has an idea of what's wrong and how I can fix it, help me. I rarely post in forums but I feel as if I'd never enjoy TV again because of this issue.
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post #2 of 27 Old 02-22-2017, 05:23 AM - Thread Starter
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I made a mistake, my TV is LG 55uh6090
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post #3 of 27 Old 02-23-2017, 09:29 AM
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Quote:
Originally Posted by A.Yayoi View Post
Hiya guys, I'm having this issue with my LG 55uh9060 TV, It continuously brightens the picture till it loses color and the color starts looking dull it's especially noticable with 2D animated shows and also dims the picture at times, I've turned off every dynamic setting and went as far as to go into the service menu to turn off dimming yet it still happens, it happens more actually. Due to my OCD this has taken over my life, quality and audio-wise this TV is great, but no matter how much a calibrate, the random brightning and dimming completely obliterates the colors and contrast.
Is there an energy saving setting somewhere? On my Samsung TV, the screen will also dim if this is turned on.
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post #4 of 27 Old 02-24-2017, 08:57 PM
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I don't know what your display does or how it's setup, but you can try to disable things like Energy Saving modes, LED Local Dimming, Motion eye care, TruMotion "Clear Plus", Dynamic Contrast/Color.
Don't use an "Intelligent Sensor" or APS (Auto Power Save) picture modes and stick to using Cinema/ISF modes.

If none of that helps, your panel might have some Thermal Protection Circuit options in the service menu (TPC Enable On/Off). This is known as ASBL for LG OLEDs, but this only turns on if there is very little change on the screen for a few minutes which isn't really a problem with real content (extremely common if used as a PC monitor, usually not enough motion to keep it off).
If you have this, your display most likely has ABL/APL, meaning your display will keep dimming when brighter areas cover more of your screen. Again, super annoying for PC usage (maximize a window, like windows explorer, and the whites will become "dim". Purely guessing here, but I'd say this is a ~70% drop in luminance, super annoying
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post #5 of 27 Old 02-25-2017, 04:53 PM
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Quote:
Originally Posted by A.Yayoi View Post
Hiya guys, I'm having this issue with my LG 55uh9060 TV, It continuously brightens the picture till it loses color and the color starts looking dull it's especially noticable with 2D animated shows and also dims the picture at times, I've turned off every dynamic setting and went as far as to go into the service menu to turn off dimming yet it still happens, it happens more actually. Due to my OCD this has taken over my life, quality and audio-wise this TV is great, but no matter how much a calibrate, the random brightning and dimming completely obliterates the colors and contrast.

So please if anyone has an idea of what's wrong and how I can fix it, help me. I rarely post in forums but I feel as if I'd never enjoy TV again because of this issue.
Hi, the issue you are talking is related with your display characteristics, it's dimming globally the scenes with low APL so you loose dynamic range, it's dimming to provide better black level but you loose peak output the same time, so the picture look so dark to these scenes (low contrast ratio).

Ted's LightSpace CMS Calibration Disk Free Version for Free Calibration Software: LightSpace DPS / CalMAN ColorChecker / HCFR
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V/P: eeColor 3D LUT Box - P/G: DVDO AVLab TPG
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post #6 of 27 Old 06-11-2017, 11:17 AM
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Quote:
Originally Posted by ConnecTEDDD View Post
Hi, the issue you are talking is related with your display characteristics, it's dimming globally the scenes with low APL so you loose dynamic range, it's dimming to provide better black level but you loose peak output the same time, so the picture look so dark to these scenes (low contrast ratio).
Hi, This is the answer I've been looking for. I just bought a LG 43 UJ6300 and this is such a pain. Any way to disable this feature?
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post #7 of 27 Old 06-12-2017, 12:56 AM
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Originally Posted by yoosedog View Post
Hi, This is the answer I've been looking for. I just bought a LG 43 UJ6300 and this is such a pain. Any way to disable this feature?
Hi, this is how the display works, you can't do anything about it, aim for LG OLED for your next display choice.

Ted's LightSpace CMS Calibration Disk Free Version for Free Calibration Software: LightSpace DPS / CalMAN ColorChecker / HCFR
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post #8 of 27 Old 06-12-2017, 06:59 AM
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Try this;

- Turn off "Smart Picture" mode

- Use the "Expert Mode" Dark or Light

- Turn off "Energy Saving" mode

- Turn off "Eye Comfort Mode", "Dynamic contrast", "Super Resolution", "Edge Enhancer" and the "Color Filter"

This post is not to guide you with regards to every setting that you may need to do but is to focus on the issue you described in you initial posting.

Give it a try you have nothing to lose.

Last edited by randal_r; 06-12-2017 at 07:33 AM.
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post #9 of 27 Old 05-21-2018, 03:34 PM
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There is a way of blackout of dimming for all TV with webos. This solution from Russian web-os forums. Big thanks to "Vodka and Bears".

Warning!!! All changes made in the service menu are made at own risk and can bring your TV to a disabled state!!!
Before modifications it is recommended to write down or make photo of screen with values which you are going to change, for the subsequent corrections of the mistakes.
Incorrect values in the service menu can't be corrected over upgrading firmware. Be very careful and attentive!

One of the next ways can be used for call the service menu:
  • Use the special service remote (not all have it)
  • Use the universal remote "One for all" (USB Changer, URC7120, URC-7556, OneForAll Kameleon, Philips SRU7140, Tiantianyong TV-139F)
  • Use smartphone with IR support
    Apps for Android:
    Galaxy S4 Universal Remote; LG Service Menu Explorer; Smart IR Remote (AnyMote Universal Remote); Galaxy IR; MyRemocon (IR Remote Control); AnyMote Universal Remote
    Apps for Nokia Symbian:
    Psiloc IrRemote; NoviiRemote
  • Use your smartphone or MP3 player with "Tessi" IR light. Or create the same with jack 3.5 and IR light from any remote control.


    Use sound files from archive. Bring the diode to TV and gradually increase a sound until you see the box for input of the password.
    Service_IR.zip

Names of files in archive correspond to the real names of service menus.
"IN START" (IN_START.Wav) - Main service menu with lots of low-level and other.
"EZ ADJUST" (EZ_ADJ.Wav) - Second service menu with other low-level and vendor parameters.
"IN STOP" (IN_STOP_.wav) - Be careful, works without password. This option immediately resets all kept TV settings and deletes all installed applications.
"POWER ONLY" (POWER_ONLY_.wav) - Without comments.

At request of the password it is necessary to enter 0413.
Use arrow buttons up/down for movement according to the service menu. Change of parameters of active point by right/left buttons (carefully, some changes comes into force immediately, some only after restart of TV). A key back for an exit from a submenu, the Settings key closes the service menu.
There are two main sections of the service menu - EZ ADJUST and IN START.
On the example of the LG LB650. For webos TV you can find dimming option only in "IN START" menu. For non-webos TV use "EZ ADJUST" menu.



Regards.
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post #10 of 27 Old 05-21-2018, 04:05 PM
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^^^^ bad advice. Messing around in the SM, even with "proven" instructions is the quickest way to brick your tv if you make a mistake, or your firmware version is different from the example given.
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post #11 of 27 Old 05-22-2018, 02:34 AM
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Quote:
Originally Posted by Otto Pylot View Post
^^^^ bad advice. Messing around in the SM, even with "proven" instructions is the quickest way to brick your tv if you make a mistake, or your firmware version is different from the example given.
All firmwares are the same for all webos TVs. Only settings for a certain model with other hardware are differs.
My LG 43LJ622V have options from OLED panel, but it inactive (3th screenshot). Also there are many options for other audio amps and an opportunity to choose the diagonal and concrete model of tv.
And in general the conversation goes only on dimming disable what are the safe.
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post #12 of 27 Old 05-22-2018, 08:23 AM
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Quote:
Originally Posted by Evgenim View Post
All firmwares are the same for all webos TVs. Only settings for a certain model with other hardware are differs.
My LG 43LJ622V have options from OLED panel, but it inactive (3th screenshot). Also there are many options for other audio amps and an opportunity to choose the diagonal and concrete model of tv.
And in general the conversation goes only on dimming disable what are the safe.
Mfrs, at least those for the N. American market, will use the same boards to save production costs and then just activate various options via firmware depending on what they want to offer for a given model. SM commands can and will differ so I certainly hope that anyone in the N. American market doesn't brick or screw their panel up following your instructions.
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post #13 of 27 Old 05-22-2018, 09:30 AM
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Originally Posted by Otto Pylot View Post
I certainly hope that anyone in the N. American market doesn't brick or screw their panel up following your instructions.
Disable dimming function may brick TV ? Fabulous nonsense...
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post #14 of 27 Old 05-22-2018, 09:42 AM
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Originally Posted by Evgenim View Post
Disable dimming function may brick TV ? Fabulous nonsense...
IF done correctly, IF the SM instructions are the same, IF the firmware version is the same, IF the board version is the same.... then yes, the dimming function should work ok. The point is that anytime one enters the SM, it is a minefield and one errant step can be disastrous.
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post #15 of 27 Old 05-22-2018, 10:26 AM
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Originally Posted by Otto Pylot View Post
can be disastrous.
Don't worry for distinctions of hardware or firmware. Watch video on youtube and read comments of users which have successfully turned off this function on the most different models from the different countries. Also it perfect works on some Sony TVs via their own service menu, but not all Sony have it function there. No one didn't report about problems or damages.
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post #16 of 27 Old 05-22-2018, 10:31 AM
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Originally Posted by Evgenim View Post
Don't worry for distinctions of hardware or firmware. Watch video on youtube and read comments of users which have successfully turned off this function on the most different models from the different countries. Also it perfect works on some Sony TVs via their own service menu, but not all Sony have it function there. No one didn't report about problems or damages.
I hope everyone who tries your hack is successful then.
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post #17 of 27 Old 05-22-2018, 10:32 AM
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Originally Posted by Evgenim View Post
Disable dimming function may brick TV ? Fabulous nonsense...
NOT. Check out the large "Samsung calibration failure" thread in this forum if you have problems with his statement. He didn't say it was a given, only that someone could accidentally do so. A newbie blundering about in the service menu and adjusting the wrong thing can do more harm than good. And there have been displays that could be bricked with incorrect settings in vertical and horizontal menu items that drove the circuitry beyond limits. This would instantly burn out pico fuses in the geometry section of the main board, shutting down the TV and saving the bad settings into memory. So replacing the fuses and restarting the TV would pop the fuses. Again. Rinse and repeat. The only way to fix it was to do an upload of the entire EEPROM via I2C. And this was only if you had made a backup of the EEPROM before the error.

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post #18 of 27 Old 05-22-2018, 10:55 AM
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Originally Posted by Rolls-Royce View Post
Check out the large "Samsung calibration failure" thread
You speak absolutely about another things. Calibration - the most difficult process, is special deep subtleties which has to be adapted by the expert. Dimming it's a simple and primitive function which have only two states "On" or "Off". There are also available "Disable Local Dimming" which perfectly works (see youtube comments).
What about calibration. Certainly there were cases of failure and the fault lies only on users hands. Why to climb in this jungle if you don't know what it will end.
I will repeat. Dimming is the primitive function created by marketing specialists to imitate TV with local dimming function and imitate the "deep black". It's safe to disable it.
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post #19 of 27 Old 06-04-2018, 05:57 PM
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I bought recently a LG 43UJ6300 TV, bad idea. Image looks terrible, backlight is so far from Samsung standard, colors looks weird. I play with all possible settings. Finally, I read in multiple forums about how to enter service menu.

For those who don’t have neither knowledge nor time to make a homemade remote, there is an alternative solution: buy a LG service remote in ebay or amazon, also known as “Remocon”. Is not that expensive: about ten dolars.

After this you can enter the service menu by pressing the IN START button, then menu System1, then disable dimming.

What was the result: well not bat, not it was not what I was expecting.
I thought changing this parameter would improve backlight a lot, that did’t happen. What actually happened was the colors getting better. Dimming, for some reason, causes some color looks strange and some other look darker. For example The Simpsons looked kind of ‘green’, after dimming if off color looks right. Same thing happened with Sonic 4 Game.

Short story, it looks better but still far from typicall Samsung quality. Don’t but LG, bad decision.
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post #20 of 27 Old 06-09-2018, 04:43 PM
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By the way, I just noticed that even if I change the dimming parameter to OFF, after a few days it resets automatically to ON. Anybody knows how to set it ON permanently?
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post #21 of 27 Old 07-06-2018, 05:05 AM
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There is also other way of shutdown of dimming. Press smart button "home icon" > choose pencil "edit mode" > delete your current hdmi connection if available. Press "connections" button > choose "all inputs" > choose your hdmi on left > press edit icon on right > choose "pc" > press add to launcher (if there are not). Open your picture profiles > choose your favorite (not eco) > edit your personal picture parameters.
Regards.
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post #22 of 27 Old 07-11-2018, 12:02 PM
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I think this is working!

Quote:
Originally Posted by Evgenim View Post
There is also other way of shutdown of dimming. Press smart button "home icon" > choose pencil "edit mode" > delete your current hdmi connection if available. Press "connections" button > choose "all inputs" > choose your hdmi on left > press edit icon on right > choose "pc" > press add to launcher (if there are not). Open your picture profiles > choose your favorite (not eco) > edit your personal picture parameters.
Regards.
I use an LC OLED55C6P as a PC monitor and the dimming drives me nuts. A few minutes of writing software code in a dark-themed text editor and the screen dims so I would constantly have to highlight a bunch of text to wake up the screen.

I'll update this post if the dimming comes back, but if I do not, it means Evgenim's suggestion is pure gold.
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post #23 of 27 Old 07-11-2018, 01:06 PM
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Originally Posted by Gary Pansino View Post
I use an LC OLED55C6P as a PC monitor and the dimming drives me nuts. A few minutes of writing software code in a dark-themed text editor and the screen dims so I would constantly have to highlight a bunch of text to wake up the screen.

I'll update this post if the dimming comes back, but if I do not, it means Evgenim's suggestion is pure gold.
Ugh, came back. Seems like a longer delay to dimming ... could just be placebo effect or wishful thinking.
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post #24 of 27 Old 07-14-2018, 04:12 AM
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Quote:
Originally Posted by Gary Pansino View Post
Ugh, came back. Seems like a longer delay to dimming ... could just be placebo effect or wishful thinking.
See this thread: https://www.avsforum.com/forum/40-ole...g-oled-tv.html

Setup:
Spoiler!
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post #25 of 27 Old 04-15-2019, 02:21 AM
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I've solved it!

On my TV, an LG 47LB850V-ZM (Read that this solution works on almost all models):

  1. You press the "Input" button
  2. Press the "Change Device Name"
  3. Select the output which you wan't to change (for example in my case it was HDMI2)
  4. Now a list appears where you can set what kind of device you have connected, previously mine was set to "Game"
  5. Choose "PC" (or other which is equivalent)
  6. Done!
My autodimming COMPLETELY disappeared after this!
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post #26 of 27 Old 05-04-2019, 08:57 PM
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Sadly nothing has worked to disable the auto dimming auto brightening of the screen for me on the 43UK6300PUE for me. It is driving me insane.
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post #27 of 27 Old 08-07-2019, 06:51 AM
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Any way to disable the dark scene dimming on the 55GA7900? I've disabled what appear to be any relevant setting (power saving, adaptive contrast, etc...)

The yo-yo effect is quite irritating. Even when something bright moves on a dark scene but the overall scene doesn't change much, it still does it :/
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