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How to fix Samsung Galaxy S8 Plus that blacked out and won’t turn on after Android 8.0 Oreo update (easy steps)

Firmware updates are supposed to fix problems but sometimes new updates bring new issues. In the case of some of our readers that own the Samsung Galaxy S8 Plus, they encountered a somewhat common problem after downloading the new Android 8 Oreo update. The problem wherein the phone blacks out or turns off on its own without apparent reason and becomes unresponsive can be considered common as we’ve seen a lot of smartphone owners having this kind of issue.

While one problem may vary from another depending on what caused it, based on our experience, if this kind of issue occurs after a firmware update, it’s most likely firmware-related. That’s what we have to look into in this post to address and answer the questions sent by some of our readers. We will try to troubleshoot a Galaxy S8 Plus that reportedly blacked out after Oreo and would no longer turn back on. If you’re one of the owners of this device and are currently having this issue, continue reading as this article may help you, somehow.

Before anything else though, if you have other issues with your device, then visit our troubleshooting page for we have already addressed several common problems with this phone. Odds are that there are already existing solutions to your problems so just take time finding issues that are similar with yours. If you can’t find one or if you need further assistance, feel free to contact us by completing our Android issues questionnaire. Please provide us with as much information as possible so that it would also be easier for us to troubleshoot the problem. Don’t worry as we offer this service for free, so all you have to do is give us sufficient information about the problem.

Troubleshooting Galaxy S8 Plus that blacked out and won’t turn on

While this kind of problem often leaves an impression that it’s a serious hardware problem as the phone doesn’t respond to whatever you do with it, in reality, it’s just a minor firmware issue. At least, that’s what we have to assume especially if there’s no sign of either physical or liquid damage. With all that being said, here’s what I suggest you do about it…

First Solution: Perform the forced restart procedure

If you’re familiar with battery pull procedure that we often do to phones with removable battery when they crash, well, it’s similar to that only that we do this with phones that have non-removable batteries. Your phone is hard-wired to do this method if the combination is done correctly. In fact, it’s the only thing that could make your device respond if the problem is indeed a firmware crash. This is how you do it:

  • Press and hold the Volume Down button and the Power key simultaneously for 10 seconds or more.

If the combination is performed correctly, your phone will reboot normally and boots up to the Home screen. You can then continue to use it however, there’s no guarantee the problem would never happen again in the future.

On the other hand, if your Galaxy S8 Plus doesn’t respond to it, try doing it a couple more times to make sure your doing it right. Or, you may try this instead:

  1. Press and hold the Volume Down button and don’t release it.
  2. Then, press and hold the Power key while holding down the Volume Down button.
  3. Keep both keys held down together for 10 seconds or more to simulate battery disconnect.

It’s similar to the first procedure only that we’re making sure that you press and hold the volume down button before pressing the power key because that’s the way it should be. Pressing and holding the power key first won’t give you the same result and the Forced Reboot won’t be performed. However, if your phone is still not responding after this, then you have to move on to the next procedure.

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Second Solution: Charge your phone and do the Forced Restart again

If the first solution failed, it doesn’t mean that the phone already has a serious hardware problem. It could be that the battery has already been completely drained. While a drained battery is not a problem, it’s possible the system crashed just before the power was cut off since some services and hardware components may not have been properly shut down. In this, you’re already dealing with two factors that both result to having an unresponsive device that won’t turn on or respond no matter how long you press the power key. Since the phone won’t charge if the firmware has crashed, this is what you need to do about it:

  1. Plug the charger to a working wall outlet and make sure you’re using the original wired charger.
  2. Using the original power / data cable, connect your device to its charger.
  3. Regardless whether the charging signs are showing or not, allow the phone to be connected to its charger for 10 minutes.
  4. After which, press and hold the Volume Down button and don’t release it.
  5. Then, press and hold the Power key while holding down the Volume Down button.
  6. Keep both keys held down together for 10 seconds or more to simulate battery disconnect.

If the issue occurred due to a drained battery and firmware crash, your Galaxy S8 Plus should already be booting up by now. But if it still not responding, then it’s time to bring it back to the shop so that a technician can check it for you.

I hope that we’ve been able to help you one way or another. If you have other concerns you want to share with us, you may contact us or leave a comment below.

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