How to fix if your device display is not working properly

Last Update date : Oct 14. 2026

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There may be a variety of reasons why your device’s display is not working properly. Your display may not work properly if it has been damaged by an external impact. Using an outdated software version may also be a cause of the issue. For more information, refer to the guide below.

Check 1. Update your device software

Outdated software may cause compatibility issues or abnormal display behaviour. Make sure your device software is updated to the latest version.

1. Open Settings > Tap Software update.

2. Tap Check for updates.

3. Follow the on-screen instructions. A confirmation will appear once the software is up to date.

how to update software

Check 2. Keep your apps up to date

Make sure that the software version of the apps you are using is up to date. Using outdated apps may cause compatibility issues with the OS.

How to update your Play Store apps

1. Open the Google Play Store app > Select your Google account.

2. Tap Manage apps & device to check for available updates.

3. Tap Update all if available.

Check for apps with available updates

How to update your Galaxy Store apps

1. Open the Galaxy Store app > tap Menu.

2. Tap Updates to check for available updates.

3. Update apps if apps update are available. 

tap menu galaxy devices tap menu galaxy devices
tap updates tap updates
check if updates are available check if updates are available

Check 3. Try restarting your device

You may experience display issues due to a temporary software error. In this instance, the issue can be resolved by simply restarting your phone. For best results, remove your SIM card and SD card before restarting your device.

Resolve temporary software issues by restarting device

① Volume down key

② Side key

Note: Press and hold the Volume down key and Side key to turn off your device. After your device completely turns off, you can turn on your device with the same method.

Check 4. Display damage due to external impact

Your screen may not function properly if it has been damaged due to an external impact. If this is the case, stop using your device and take it to your nearest service center for repair.

Device display damage due to external impact

Useful display settings

Adjust font size and style

You can adjust your font size and style according to your preferences or needs. Follow the steps below to change the size and style of your font.

Step 1. From Settings, navigate to Display, then tap Font size and style.

Step 2. As desired, adjust the Font style and Font size.

Adjust Font size and style

Adjust Screen zoom

You can adjust settings to make your content appear smaller or bigger on your screen. Refer to the following guide to adjust your screen zoom.

Step 1. From Settings, navigate to Display, then tap Screen zoom.

Step 2. Using the Screen zoom (plus/minus bar) on the bottom of the screen, adjust your Screen zoom.

Adjust display Screen zoom

Adjust the screen ratio according to the app in use

When watching a video, you may prefer a higher screen ratio. However, a smaller screen ratio that requires less range of motion may be more convenient when texting or using a messenger application. Try adjusting the screen ratio according to the app you are using.

Step 1. From Settings, navigate to Display, then tap Full screen apps.

Step 2. Tap Camera cutout, then select the apps that you would like to adjust the screen ratio for.

Adjust screen ratio with Camera cutout

Disable the Eye comfort shield setting

Is your display color too warm? Try disabling the Eye comfort shield setting.

Disable Eye comfort shield setting

Note: Device screenshots and menus may vary depending on the device model and software version.

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