Samsung Galaxy S8 screen started to flicker shortly after a firmware update [Troubleshooting Guide]

A screen flickering issue might be a sign of a minor problem in the firmware which often manifests after an update. It’s because some of the caches or system files may have become corrupt or obsolete and this, somehow, results to a minor performance issue. However, it could also be a sign of a serious hardware problem involving the display itself especially if the phone shows signs of liquid or physical damage.

In this post, I will tackle this issue once again with the Samsung Galaxy S8 being the subject of our troubleshooting. We will try to rule out the possibility that this is just a minor firmware issue so that you can immediately bring your phone to a technician in case the problem isn’t fixed on your end. Remember, when it comes to hardware problems, only authorized technicians are allowed to open the phone up because if you do it yourself, the warranty will be void and you may end up having to buy a new one if the problem is serious. So, read on as this article maybe able to help you.

Now, before we jump into our troubleshooting, if you have other issues with your phone, make sure you drop by our Galaxy S8 troubleshooting page as we’ve already published a lot of articles that tackle problems reported by our readers. Odds are that we may have already published solutions to your problems. So, try to find issues that are similar with yours and use the solution we suggested. If you need further assistance, you can always contact us by completing our Android issues questionnaire.

How to troubleshoot screen flickering issues with Galaxy S8

Problem: There was this update I downloaded a few days ago and after it was installed, my phone’s screen seems to turn on and off really fast that it may seem like a static or something. It doesn’t affect the way the phone works but it’s just annoying having a new phone that has this issue. Just for the record, the problem didn’t occur prior to the update so it might have been the new version of Android that messed my phone up. Do you know how to fix this? Thanks.

Troubleshooting: We know a couple of things you can do to fix this issue provided that it’s a problem with the firmware. Hardware-related issues, on the other hand, need a technician who can physically check the phone and we can only do so much about them. The best thing we can do on our end is to rule out the possibility that it’s just some apps or a firmware glitch that causes this and with all that being said, here’s what I suggest you do about it:

Step 1: Do the forced restart procedure

We’ve seen flickering issues before that were caused by system glitches or some minor issues with the apps. These problems can easily be fixed by pulling the battery out of the phone to refresh its memory and load up all necessary services during boot up. However, you Galaxy S8 doesn’t have a removable battery so all you can do is the forced restart.

Just press and hold the Volume Down button and the Power key together for 7 to 10 seconds. Your phone will then reboot like it usually does and once it becomes active and ready to use, closely observe it to know if the flickering continues. If it does, then move on to the next step.

Step 2: Start your phone up in Safe mode

We will now rule out the possibility that this problem is due to some third-party apps that might be crashing in the background. By booting the phone up in Safe mode, you’re actually temporarily disabling all third-party apps. So, if one of them is causing the problem, the flickering shouldn’t occur in this mode. Here’s how you boot your Galaxy S8 in this environment:

  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.

If the flickering doesn’t occur in safe mode, then you’ll have to find the app that’s causing the problem and then uninstall it.

  1. From the Home screen, swipe up on an empty spot to open the Apps tray.
  2. Tap Settings > Apps.
  3. Tap the desired application in the default list or tap 3 dots icon > Show system apps to display pre-installed apps.
  4. Tap the desired application.
  5. Tap Uninstall.
  6. Tap Uninstall again to confirm.

However, if the flickering continues even in safe mode or after uninstalling the apps you suspect are causing the problem, then move on to the next step.

Step 3: Backup all your files and data and reset your phone

This is the last procedure you need to do to determine if the problem is with the firmware or not. After the reset and the flickering still occurs, then you have to bring the phone to the shop and let the tech run some tests that may point out what the problem really is.

Before the reset, don’t forget to back up important files and data as they will be deleted. After that, feel free to follow these steps to reset your phone:

  1. Turn off the device.
  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).
  4. Press the Volume down key several times to highlight “wipe data / factory reset.
  5. Press Power button to select.
  6. Press the Volume down key until ‘Yes — delete all user data’ is highlighted.
  7. Press Power button to select and start the master reset.
  8. When the master reset is complete, “Reboot system now” is highlighted.
  9. Press the Power key to restart the device.

I hope this helps one way or the other.

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