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Galaxy S7 edge has black screen with padlock icon and green loading circle after Android Oreo update

As of this writing, Samsung is still on the process of rolling out Android Oreo to #GalaxyS7 and #GalaxyS7edge devices around the world. Based on historical data during and after each major operating system overhaul, issues always abound. Today’s troubleshooting guide is intended to help Galaxy S7 users who encounter a black loading screen after Android Oreo update. If you’re one of these users make sure that you follow our suggestions in the correct order to address the problem.

Before we proceed, we want to remind you that if you are looking for solutions to your own #Android issue, you can contact us by using the link provided at the bottom of this page. When describing your issue, please be as detailed as possible so we can easily pinpoint a relevant solution. If you can, kindly include the exact error messages you are getting to give us an idea where to start. If you have already tried some troubleshooting steps before emailing us, make sure to mention them so we can skip them in our answers.

Today’s problem: Galaxy S7 edge shows black screen with padlock icon and green loading circle after installing update (Android Oreo)

Hi there. Let latest upgrade start on my Galaxy S7 Edge. After a while I thought it must be done as it was at the passcode pin number screen requesting I enter my passcode pin, I entered my pin and it then showed a black screen with an open padlock picture and a continually whirling green circle, the phone is also very hot, it was like that for 3 hours. I then did a ‘sound down button pressed whilst holding power button’, this restarted the phone, it again then showed the enter passcode PIN again, I ensured I entered this correctly. It again has gone into the black screen, open padlock and constantly whirling green circle around the padlock. I am not the only one who now has no phone as you can see at this link: https://www.gsmarena.com/newscomm-18343p5.php I really, really hope you can get some fixes from somewhere for this. Frustrated and livid not having a working phone now after this update. Don’t they test these things before launching them wholesale? Thanks. — Tina Tinadeeming

Solution: Hi Tina. The GSMarena link you cite here actually talks about an earlier update and most probably not the latest Samsung release of Android Oreo to S7 and S7 edge devices. The original article whose comments were taken from was written on 21 May, 2016 so we don’t think we’re on the same page. At this time of our writing, we’re trying to address the new updates for the Galaxy S7 and S7 edge that brings them Android Oreo only.

If that’s the update that messed up your S7, then we say you’re not alone. Just like in any other major operating system overhaul, like the update from Nougat to Oreo, some devices may encounter problems. Despite Google’s and Samsung’s efforts to release a stable operating system upgrade, not all devices may be prepared to take it. There are so many things that can factor in to your problem that it’s borderline impossible to know what may be the main reason for it. If you are positive though that the only different thing you did was to install Android Oreo, there are a few things that you can try to fix it.

Refresh the system cache

The first thing to be negatively impacted after an update or app installation sometimes is the system cache. This type of cache is basically just another set of temporary files Android uses to work efficiently. However, in some cases, updates may corrupt this cache leading to all sorts of problems. To check if you have a system cache issue, try to wipe the cache partition where it is stored. Here’s how:

  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. Using the Volume Down key, 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 doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  9. Let the phone reboot and check for the problem.

Boot to Safe Mode

Since your Galaxy S7 edge appears to be stuck in its initialization screen and won’t load Android normally, the next good thing that you can do is to try booting it to safe mode. This is achieved by doing a specific set of hardware button combination. If your device will load to Safe Mode, that can mean one of the added apps is problematic. It can also mean that there’s an issue with the operating system. While in this mode, you can try to troubleshoot the app problem by using the process of elimination. Basically, what you need to do is to uninstall an app and to check for the problem by booting back to normal mode. If the issue remains, you have to repeat the cycle until you isolate the problem.

To boot your S7 edge to safe mode:

  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.
  8. Let your S7 run in this mode for several hours and check for the problem.

Factory reset

A drastic solution that you can too is factory reset. You only need to do this if nothing happens after you wiped the cache partition, or if the device won’t load to safe mode at all. Factory reset will basically return all software settings back to their defaults by wiping user data and third party apps. If the issue is not coding-related, which means that the update was not the main reason to begin with, factory reseting your S7 will most probably fix the problem. We’ve seen a number of cases recently that a quick reset via Recovery Mode did the job so hopefully, this will happen in your case as well. The only downside to this now is the fact that the reset will delete all your unsaved data prior to the installation of Android update. Other than that, your S7 will benefit significantly from this procedure.

To factory reset your S7:

  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. Using the Volume Down key, navigate through the options and highlight ‘wipe data / factory reset.’
  6. Once highlighted, you may press the Power key to select it.
  7. Now highlight the option ‘Yes — delete all user data’ using the Volume Down key and press the Power button to select it.
  8. Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  9. The phone will now reboot longer than usual.

Use Smart Switch emergency software repair

In order to facilitate minimum hassles in moving files to and from a Samsung device, Samsung has created Smart Switch. This app comes pre-installed on the Galaxy S7 but can also be installed on a computer. In some cases, Smart Switch can also function as a quick repair tool if your software has encountered an error. To see if you can utilize Smart Switch in your situation, you need to have a computer where you can install it; Smart Switch works on Windows and Mac. Once you’ve installed Smart Switch on your computer, all you have to do next is to connect your S7 to the PC or Mac via USB cable. Make sure that your S7 is on and Smart Switch on your computer is running. If there’s a popup that says you can repair your phone’s software, go ahead and do it. If there’s no such pop-up at all, that means Smart Switch is not detecting your phone, or there’s nothing that it can do for you.

To get detailed instructions on how to install Smart Switch on your computer, visit this link.

Flash stock firmware to your device

With no clear idea what exactly is causing your problem, you can consider doing an advanced solution at this point — flashing stock firmware to your phone. Flashing is inherently risky so you have to decide if it’s worth doing in this case. While not exactly difficult to do, Samsung does not recommend it as it can lead to more serious software issues if something goes wrong. If done properly though, it can potentially fix your issue as you can use it to downgrade the current Android version to the more stable older version.

We won’t discuss how you’re going to get flashing done on your S7. If you want to take the risk and try this solution, we suggest that you look for a good flashing guide from reputable sites like XDA-Developers Forum. Flashing guides are phone model specific so be sure to look for one intended for the phone model you have.

 


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