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Samsung Galaxy S7 no longer turns on after Nougat update [Troubleshooting Guide]

Not being able to power up maybe caused by a hardware issue but there are cases wherein a firmware problem can also result to this kind of concern. Some of our readers who own the Samsung Galaxy S7 contacted us about this specific problem and some of them said that the problem occurred after the recent Nougat update. We may have already addressed many issues like this in the past and while the issues before and now may be the same, there’s one difference–this time we’re dealing this problem with Android Nougat on.

In this post, I will walk you through in troubleshooting your S7 that won’t turn on after an update. We will try to consider each possibility and rule them out one by one until we arrive at the point where it would be easier to pinpoint what the real problem is and what caused it. If you own this phone and are currently experiencing similar issue, then read on as this post may be able to help fix it.

Read on to learn more about this issue but if you have a different problem, make sure you drop by our troubleshooting page for we have already addressed a lot of issues with this device. Find problems that are similar with yours and use the solution or troubleshooting procedures we suggested. We depend our troubleshooting guides on the information you give us so make sure you provide us with accurate details so we can give you more accurate solutions. Just fill up our Android issues questionnaire to contact us.

How to troubleshoot your Galaxy S7 that is unable to power up

It is important to know why your phone isn’t turning on so that we would know how to fix it and that’s what this troubleshooting guide is all about. Now, before we jump right into our troubleshooting steps, here’s one of the problems sent by our readers.

Problem: My Galaxy S7 wont turn on but when I plug in a USB the battery shows up on the screen  with 70% charge and a green dot flashes on the LCD directly above the home button.

Solution: Hello, as you mentioned that the device has 70% battery left but it refuses to turn on, then most likely it is a firmware-related issue. More often, it is because the firmware could not load up that resulted to your device that won’t power up. And the green dot that is showing on your screen might be due to a  dead pixel. The best thing that you should do is to contact your retailer about it for there might be a chance that they will replace the screen of the device. But before doing so, we recommend that you should troubleshoot it first to determine if it is a software or hardware problem. Here are the methods that we want you to do:

Step 1: Perform Forced Reboot procedure

Since the battery can’t be removed, this method is similar to the battery-pull procedure wherein the memory of the phone will be refreshed and this eliminates the suspicion that a glitch in the system might be causing the issue. The good thing about force reboot is that any minor issues can be fixed by it without bringing your phone to the tech. To do so, just press and hold the Power and Volume Down keys together for 7-10 seconds and wait until it reboots. But if the procedure won’t resolve the issue, you can do the next method.

Step 2: Charge your phone and do the forced reboot

It’s possible that the battery of your phone is just drained that’s why it won’t turn on no matter what you do. So, to rule this possibility out, plug the charger in and connect your phone. You can tell immediately if it responds because you can see the charging signs but regardless if they show or not, leave your phone plugged in and after a few minutes, perform the Forced Reboot procedure again. If that won’t bring your phone to turn on, then move on to the next step.

Step 3: Restart your Galaxy S7 in Safe mode

By booting in this mode, we will determine if there were rogue apps that conflict the system and triggered the device to not booting up. Take note, that this is just an android environment that temporarily disables all third-party apps. So, if it turns on while in safe mode, then probably there’s an app you need to uninstall because that may be the reason the issue is happening. Just follow these steps to boot your phone 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.

Step 4: Find, reset and / or uninstall suspected app

Assuming your phone booted up successfully in safe mode, then it’s time to find the app that’s causing the problem, reset and update it if possible and if that won’t work, then you should uninstall it. Finding the app that’s causing the problem is the most challenging part here so start from apps that you installed shortly before the problem begins.

How to clear app cache and data on Galaxy S7

  1. From any Home screen, tap the Apps icon.
  2. Tap Settings.
  3. Tap Applications.
  4. Tap the desired application in the default list or tap Menu icon > Show system apps to display preinstalled apps.
  5. Tap Storage.
  6. Tap Clear cache.
  7. Tap Clear data and then tap OK.

How to update apps on your Galaxy S7

  1. From any Home screen, tap the Apps icon.
  2. Tap Play Store.
  3. Tap the Menu key and then tap My Apps. To keep your apps automatically updated, tap the Menu key, tap Settings, and then tap Auto-update apps to select the check box.
  4. Choose one of the following options:
    • Tap Update [xx] to update all applications with updates available.
    • Tap an individual application and then tap Update to update a single application.

How to uninstall apps from your Galaxy S7

  1. From any Home screen, tap the Apps icon.
  2. Tap Settings.
  3. Tap Applications.
  4. Tap the desired application in the default list or tap Menu icon > Show system apps to display preinstalled apps.
  5. Tap Uninstall.
  6. Tap Uninstall again to confirm.

Step 5: Clear the System cache of the phone

If your phone failed to boot up in safe mode, then clearing the system cache partition should be the next thing that you should do. Through this method, the components inside will be powered up and the caches will be deleted and replaced by newer ones. So, if it boots up without a problem, then it might be a firmware issue triggered it. Here are the steps that you should do:

  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. The phone will now reboot longer than usual.

Step 6: Reset your Galaxy S7

However, if all procedures didn’t resolve the issue, then you should reset the device. But before you do so, make sure to backup everything because all files and data including the applications you downloaded from Play Store will be deleted. After the backup, disable the Factory Reset Protection so you won’t be locked out of your device:

  1. From any Home screen, tap the Apps icon.
  2. Tap Settings.
  3. Tap Cloud and accounts.
  4. Tap Accounts.
  5. Tap Google.
  6. Tap your Google ID email address. If you have multiple accounts setup, you will need to repeat these steps for each account.
  7. Tap Menu.
  8. Tap Remove account.
  9. Tap REMOVE ACCOUNT.

And then follow these steps to reset your Galaxy 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.

Alternatively, you can reset your phone from the Settings menu…

  1. Back up data on the internal memory. If you have signed into a Google account on the device, you have activated Anti-theft and will need your Google credentials to finish the Master reset.
  2. From any Home screen, tap the Apps icon.
  3. Tap Settings.
  4. Tap Cloud and accounts.
  5. Tap Backup and restore.
  6. If desired, tap Back up my data to move the slider to ON or OFF.
  7. If desired, tap Restore to move the slider to ON or OFF.
  8. Tap the back key twice to return to the Settings menu, then tap General Management.
  9. Tap Reset.
  10. Tap Factory data reset.
  11. Tap Reset device.
  12. If you have screen lock turned on, enter your PIN or password.
  13. Tap Continue.
  14. Tap Delete all.

If none of these procedures solved the problem, then it’s time you brought your device to a shop and let the tech fix the problem for your.

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