[LG Monitor Screen] The screen turns darker. The screen turns dark and bright repeatedly

Causes and Symptoms

• The cable connection is not good.
• Monitor setting is changed.
• The PC is in night mode or the HDR function is [On].

Try this

Did you check the power cord and the monitor adapter connections?

➔ Check if the power cord is plugged into a power strip and the monitor adapter is connected properly.

Is the cable connected properly?

➔ Check if the pins are damaged or have foreign objects. If they do, replace the cable with an authentic cable.

Did you check the monitor’s super energy saving function?

➔ If you use the Smart Energy Saving function, the screen might get darker or brighter.

How to set the SMART ENERGY SAVING function

※ Menus may differ by model, so please refer to the user guide for details.

1. Press the joystick button.

2. Move to the right to select [Settings].

3. In [General], set [SMART ENERGY SAVING] to [Off].

Did you reset the monitor setting?

➔ Due to a monitor setting error, the screen brightness can get changed. So, reset it to the factory setting.

How to reset the monitor

※ Menus may differ by model, so please refer to the user guide for details.

1. Press the joystick button.

2. Move to the right to select [Settings].

3. In [General], select [Reset Initial Settings] and press [OK] to reset it.

Did you check the PC to see if the [Night Mode] function is enabled?

1. In the input window at the left bottom of background, search for [Night light] and select it.

2. In the night mode setting, click the [Turn off now] button to disable the function.

Did you check the HDR function on your PC?

➔ If the HDR function is set to [On], there can be changes in the brightness, so set it to [Off].

Note

What is HDR(High Dynamic Range)?

This technology makes a bright place brighter and a dark place darker, so that humans can feel like they are seeing it through their own eyes.

Setting HDR in Windows 10

1. Right click on your desktop of Windows 10 and select [Display settings].

2. Set [Use HDR] to [Off].

This guide was created for all models, so the images or content may be different from your product.