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My Samsung TV Dims Automatically: Fix The Brightness Issue

My Samsung TV Dims Automatically: Fix The Brightness Issue

If your Samsung TV dims automatically then it can be quite alarming. However, in the majority of cases, this isn’t a problem with your TV but a built-in feature that Samsung has added intentionally.

If your Samsung TV dims automatically the first thing to check is the Ambient Light Detection Function, or the ECO sensor in some of the older models. This feature uses a sensor to detect light input and then adjusts the brightness accordingly. However, this option can be switched off in the settings menu of the television.

If your Samsung TV is still dull-looking after switching off the ambient light detection, we will share some other possibilities that could be causing the brightness issue.

What is causing my Samsung TV to dim automatically?

samsung tv keeps dimming automatically

As previously mentioned, most Samsung dimming errors aren’t actually errors at all. It turns out it’s a feature that Samsung has been installing in their TVs since as early as 2013.

The Ambient Light Detection Function, or the ECO sensor on some older models, measures the light in the room. This can help you save on your electricity bill as the TV will adjust the brightness automatically, aiming to provide you with the best viewing experience.

Your TV will become brightly lit if exposed to bright light in order to counteract it. And in a darker room, it will conserve power by dimming the screen.

Other reasons why your Samsung TV dimms automatically are:

  • A defective LED
  • Energy saving mode
  • Brightness settings
  • Eco Sensor 
  • Ambient Light Detection function

How to stop a Samsung TV from dimming automatically

television dark screen
Processed with VSCO with f2 preset

This feature isn’t for everyone and some people would rather set the brightness level themselves so there is an option to turn it off.

First, you need to work out whether your model was made in before 2016 or after 2017, a quick Google search of the TV model will be able to tell you.

For 2016 models or older go to “System”, “Eco Solution”, “Eco Sensor” and select “on” or “off”.

Models that were made in 2017 or later go to “Settings”, “General”, “Ambient Light Detection” and use the slider to turn it up or down.

My TV screen is broken, I need a new TV

If you’re ‘dim’ Samsung screen is actually more of a serious issue that can’t be fixed, then you may be looking for a replacement TV. Here are some suggestions that we personally love.

If you don’t quite have the money to spend but still want something amazing, we recommend the LG Electronics OLED65B9PLA 65-Inch UHD 4K HDR Smart OLED TV which has amazing picture quality.

For those of you on a tighter budget, you can still get this Sharp 1T-C32BB4IE1NB 32 Inch HD Ready LED TV.


  • Michael Stokes

    Over 10 years of experience working as a technical support engineer. Highly skilled in fixing any technical issue, including app configuration and account setup, gaming errors, television problems, and any other electronics-related issue. You can find out more about him at

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