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How to fix Samsung Galaxy S7 black screen issues that occurred after the update

Black screen issues are among the common complaints we received from our readers especially from #Samsung Galaxy #S7 owners. While the phone is powerful enough to do virtually all tasks a user might want it to do, there are times when the system crashes or freezes. Crashing apps, inconsistencies with the firmware and hardware problems may cause it that’s why it’s necessary that you troubleshoot your phone.

Galaxy-S7-black-screen-problem

I will answer two of the problems sent by our readers in this post so if you own a Galaxy S7 and you’re currently bugged by a black screen issue, I suggest you take time to read this post as it might help you fix it.

To our readers who have other problems, visit our troubleshooting page. There are hundreds of problems that we addressed on that page. Find issues that are related to what you’re experiencing right now and use our solutions. You can also contact us through this form in case you need more help.

Galaxy S7 black screen after the update

Problem: Hi, I have this Galaxy S7 for a month now and I don’t have any issues with the performance of the device. However, after I updated the Operating System the device screen went black I tried to reboot the device several times but it’s not working. Any suggestions how to fix this issue? –Mark

Troubleshooting: Hello Mark, this issue is common to Galaxy S7 users especially after doing some system updates on their device. In fact, there are factors that we need to consider why your device has this kind of issue right now. It could be a hardware, an apps or just a simple firmware issue. But as of this time, I won’t directly give a conclusion regarding your issue. Instead, I want you to follow the troubleshooting procedures below [that I have to provide] to fix so we would know what the problem is and also to come up to the a conclusion of what really triggers it.

Step 1: Force Reboot your device

Due to the update chance that the issue was caused by a simple firmware crash. Meaning, that the phone couldn’t load the operating system of the device and that the reason why the screen went black. However, through the force reboot procedure you can figure out if your phone can reboot itself normally or not. So, to do this you can just simply press and hold the Power and Volume down keys simultaneously for about 10-15 seconds.

On the other hand, make sure that the phone has enough battery before performing the procedure to make the components inside of the device will be powered up and also the firmware can run normally. But if your phone cannot reboot normally or cannot even turn on then, then charge the device and wait for 10-15 minutes to make sure that there’s enough power before doing the forced reboot procedure again.

Step 2: Boot the device in Safe Mode

After you successfully turn on the device then, you can directly proceed in booting up your phone to Safe mode. Through this procedure you can determine if there are third-party apps that make caused the firmware to become unresponsive. If so, then you can uninstall the app to avoid the same issue occurring again in the future.

On the other hand, if the forced reboot procedure didn’t work, at least, try to do this procedure to find out if the device is capable of powering up and loading the default services and apps. Here’s how you restart your device in safe mode:

  1. Press and hold the Power key.
  2. As soon as you can see the ‘Samsung Galaxy S7’ on the screen, release the Power key and immediately hold the Volume Down key.
  3. Continue holding the Volume Down button until the device finishes rebooting.
  4. You may release it when you can see ‘Safe mode’ in the bottom left corner of the screen.

If the phone refused to boot into this mode either, then try the next step.

Step 3: Try booting it in Recovery Mode

Booting the phone in recovery mode won’t probably fix the problem but it sure will give you an idea if the problem is with the hardware or just the firmware because if successful, it means that the device can actually power up its components and the problem is that the firmware can’t load all necessary services. If this is the case with your device, then wiping the cache partition while inside the recovery mode is the safest (for your data and files) and most logical thing to do. So, try the steps below to boot the phone into recovery mode:

  1. Turn off your Samsung Galaxy S7.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  4. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  5. Assuming your phone has successfully reached this step, then use the Volume Down key to navigate through the options and highlight ‘wipe cache partition.’
  6. Once highlighted, you may press the Power key to select it.
  7. Now highlight the option ‘Yes’ using the Volume Down key and press the Power button to select it.
  8. Wait until your phone is finished wiping the cache partition. Once completed, highlight ‘Reboot system now’ and press the Power key.
  9. The phone will now reboot longer than usual.

However, if your phone can’t boot in recovery mode, then you have no other choice but to bring the phone to the technician and have it checked.

Galaxy S7 screen randomly blacks out after an update

Problem: I have a Galaxy S7 phone that updated last week, I think. As far as I know, the update was completed and successful and I haven’t encountered a problem until recently when I noticed that my phone’s screen randomly blacks out. When it does this, I think the phone is still on because there was one time when a message came in just in time when the screen blacked out. So, the LED indicator showed a blue light that’s blinking, an indication that I have an unread message. I tried hitting the Power/Lock key and the phone didn’t respond but after a minute or so, the screen turned back on and the phone actually worked like nothing happened. There was also one time when the device turned off on its own but powered back on when I pressed the Power key. I don’t know what’s happening here so if you guys are so kind enough to help me with it, I would surely appreciate it. thanks.

Troubleshooting: Based on the description, it seems that the phone is suffering from a minor firmware issue that may have been caused by the recent firmware update. The issue is causing the firmware to freeze or hang for a few seconds before you can gain control of the phone again. Hence, the blue LED blinking while the screen is black. If it takes more than a minute before you can regain control of your phone, then it’s best that you do the Force Reboot as it only takes 30 seconds or so to bring the phone back to life not to mention that it refreshes the handset’s memory. To do this, just press and hold the Volume Down button and the Power key simultaneously for 10 seconds.

Should the problem continue to bug you, try deleting the system cache through the recovery mode and if it persists after that, then it’s time you try to reset the device.

  1. Backup your data.
  2. Remove your Google account.
  3. Disengage screen lock.
  4. Turn off your Samsung Galaxy S7.
  5. Press and then hold the Home and Volume UP keys, then press and hold the Power key. NOTE: It doesn’t matter how long you press and hold the Home and Volume Up keys, it won’t affect the phone but by the time you press and hold the Power key, that’s when the phone starts to respond.
  6. When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  7. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds. NOTE: The “Installing system update” message may show on the screen for several seconds before displaying the Android system recovery menu. This is just the first phase of the entire process.
  8. Using the Volume Down key, navigate through the options and highlight ‘wipe data / factory reset.’
  9. Once highlighted, you may press the Power key to select it.
  10. Now highlight the option ‘Yes — delete all user data’ using the Volume Down key and press the Power button to select it.
  11. Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  12. The phone will now reboot longer than usual.

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