How to fix Samsung Galaxy S9 with black screen and blue light blinking (easy steps)

The Samsung Galaxy S9, while it’s probably the most powerful smartphone in the market today, is still subject to some problems and errors and among the most common is the Black Screen of Death. This issue comes in different variants. More often you get the black screen and unresponsive screen but there are times when you get the black screen with blue light blinking. The latter is easier to fix, actually. The blinking blue light is a sign that the phone is still powered on although unresponsive.

When a phone has the black screen with blue light blinking, you can dial the number and the phone will actually ring and if the volume is set to an audible level, you can hear it. However, the screen remains black and the phone seems unresponsive. In this post, I will walk you through in troubleshooting your phone and fix the problem so that you may continue using it. Most of the time this problem can be fixed without any help from a technician and I hope you’re up to the challenge to do some basic troubleshooting procedures to try and fix the issue.

Before going further, if you found this post because you were trying to find a solution to your problem, then try to visit our Galaxy S9 troubleshooting page as we’ve already addressed most of the commonly reported issues with the phone. We’ve already provided solutions to some of the problems reported by our readers so try to find issues that are similar with yours and use the solutions we suggested. If they don’t work for you and if you need further assistance, fill up our Android issues questionnaire and hit submit.

Fix Samsung Galaxy S9 with black screen and blue light blinking

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Do you know what the common cause of this issue is? Firmware crash. That’s right! A firmware crash is often the reason why a powerful Galaxy S9 suddenly has a black and unresponsive screen but there’s a blue light blinking. Here’s what you’re going to do about this problem:

First solution: Forced Restart

A system crash can easily be fixed by doing the Forced Restart but some of our readers have actually questioned: how can a non-responsive phone turn on by doing this method? The phone is hard-wired to respond to it as long as it’s done correctly. It simulates battery disconnect and the phone actually responds to it like when phones with removable batteries respond to battery pull.

You can perform the Forced Restart by pressing and holding the Volume Down button and the Power key at the same time for 10 seconds or more. Your Galaxy S9 may reboot normally and if it actually does, that’s the end of this problem. However, there’s no guarantee that it would never occur again in the future but, at least, you already know what to do now.

However, if your phone still won’t respond to this procedure, try doing it a couple more times and if it still doesn’t respond, try doing this instead:

  1. Press and hold the Volume Down button and don’t release it.
  2. While holding it down, press and hold the Power key.
  3. Keep both keys held down for 10 seconds or more.

It’s basically the same as the first procedure only that we’re making sure you press and hold the Power key after the Volume key because doing it otherwise won’t give you similar result.

If your Galaxy S9 still has a black screen with blue light blinking after doing this, then move on to the next solution.


Second solution: Charge and Force Restart

You need to do this procedure to rule out the possibility that the problem is caused by both a drained battery and system crash. When the battery is already at a very low level and you’re still using the phone, the juice may run out with the phone still being used and this will result to a system crash as the hardware and firmware aren’t properly shut down. So, you’re actually dealing with a couple of issues here instead of one.

I said that your phone will always respond when the Volume Down and Power keys are held together for a certain amount of time but if the battery is drained, there’s no way your phone will actually turn on. So, try doing this:

  1. Plug the charger to a working AC outlet. Use a wired charger for this.
  2. Using the original cable, connect your phone to its charger.
  3. Regardless whether your Galaxy S9 shows the charging signs or not, leave it connected to its charger for 10 minutes.
  4. Now, press and hold the Volume Down button and don’t release it.
  5. While holding it down, press and hold the Power key.
  6. Keep both keys held down for 10 seconds or more.

If your phone indeed drained its battery and its firmware crashed, then it should be booting up now after you’ve done this procedure. However, if it remained unresponsive and you haven’t noticed any improvements, then it’s time to bring it back to the store or shop so that a technician can check it up for you.

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