What to do if Galaxy S8 has screen discoloration and won’t turn on

If your Galaxy S8 screen is showing lines and shades that were not there before, you’ll most likely need to send it in. In some cases though, there may be some workarounds that you can do. Learn how to fix screen discoloration below.

Problem: Galaxy S8 has screen discoloration and won’t turn on

Ok, so i found my phone on the table where i placed it and the screen was green but i could see the apps i dont know what to do so i hit the power key and the green screen just appears the straight line and the horizontal green line and my phone screen turned black after that. I tried to do all of your step but it doesn’t work. The phone still work because i could see the little dot lights up red whenever i charge and it lights up blue when i did the force reboot. I could surely tell by it flash whenever i received notifications. It just the screen wont turn on. Please help! Its a galaxy s8.

Solution: Any normally working screen should not display any discoloration or shade for long. The presence of discoloration and lines (vertical or horizontal) is consistent with a damaged display so the most likely problem is a bad screen. At this point, the best thing that you can do is to let a professional examine the hardware so you can get an accurate assessment.

There are, however, some cases of screen discoloration or erratic screen behaviors due to app- or software-related problems. If you are positive that the device was not dropped or physically impacted prior to noticing the bad screen, you may still be able to do something about it. Below are the troubleshooting steps that you must try in that case.

Solution 1: Do a forced restart

Your Galaxy S8 may have encountered a temporary bug that prevents the screen from working normally. To check, you want to simulate the effects of a “battery pull.” This is a simple procedure that tries to mimic the effects of having disconnected the battery to turn the system off. Since your Galaxy S8 has a non-removable battery pack, you won’t be able to physically detached the battery. Instead, you can only try a forced restart by doing a combination of presses of hardware buttons. Here’s how that’s done:

  1. Press and hold the Power + Volume Down buttons for approximately 10 seconds or until the device power cycles. Allow several seconds for the Maintenance Boot Mode screen to appear.
  2. From the Maintenance Boot Mode screen, select Normal Boot. You can use the volume buttons to cycle through the available options and the lower left button (below the volume buttons) to select. Wait for up to 90 seconds for the reset to complete.

Solution 2: Observe on Safe Mode

Should a forced reboot won’t make a difference, the next best thing to do is to restart the phone to Safe Mode. By doing this, you want to check whether or not a downloaded application is the culprit. Learn how to restart your Galaxy S8 to safe mode below:

  1. Turn the device off.
  2. Press and hold the Power key past the model name screen.
  3. When “SAMSUNG” appears on the screen, release the Power key.
  4. Immediately after releasing the Power key, press and hold the Volume down key.
  5. Continue to hold the Volume down key until the device finishes restarting.
  6. Safe mode will display in the bottom left corner of the screen.
  7. Release the Volume down key when you see Safe Mode.

Remember, safe mode is not a solution but a tool that should help you check if there’s an app issue. If the problems mentioned here won’t exist on safe mode, it means that one of the apps is causing them. However, Safe Mode won’t identify the problem app. You’ll have to investigate further to know which of them is the culprit. You’ll need to do the following:

  1. Boot to safe mode.
  2. Check for the problem.
  3. Once you’ve confirmed that a third party app is to blame, you can start uninstalling apps individually. We suggest that you begin with the most recent ones you added. It’s important to delete apps one by one.
  4. After you uninstall an app, restart the phone to normal mode and check for the problem.
  5. If your Galaxy S8 still has the same problem, repeat steps 1-4.

Solution 3: Boot to Recovery Mode

If the screen is still a problem, or if you are unable to boot up to Safe Mode, there’s little chance that this next troubleshooting step will help. By booting to Recovery mode, you are hoping that an Android OS bug is the cause of the problem but otherwise, the screen is physically intact. If there’s a software bug behind the trouble and you will be able to go to Recovery Mode, a cache partition wipe or factory reset may help. Both of these options are accessible in Recovery Mode.

How to boot a Galaxy S8 to Recovery Mode

  1. Turn off the device. This is important. If you can’t turn it off, you’ll never be able to boot to Recovery Mode. If you are not able to shut the device off regularly via the Power button, wait until the phone’s battery is drained. Then, charge the phone for 30 minutes before booting to Recovery Mode.
  2. Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
  3. When the green Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).

Solution 4: Contact Samsung

If nothing works up to this point, you should get help from Samsung. A deeper hardware check needs to be done to see what is wrong with the device, especially if there’s no obvious signs externally. Afterwards, they may recommend repair or replacement depending on the severity fo the problem.


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Harvey is keen with mobile technology and loves writing about all things mobile. He is passionate in helping technology-challenged people by finding resolution to their issues.

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