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Samsung Galaxy S7 won’t turn on after Android Nougat update [Troubleshooting Guide]

Firmware updates are supposed to fix issues but many have been complaining about their phones having new problems after the Android Nougat update. Such is case with some of our readers who own Samsung Galaxy S7 units.

I will be tackling a power-related issue with the S7 being the subject of the troubleshooting. We will look into some of the factors that have contributed why a powerful smartphone can no longer successfully power on after the update.

While we are always willing to help our readers fix issues with their phones, there are times when we can’t fix the issue through our online solutions especially if the problem is related to the hardware. In which case, you need help from a technician to have the phone checked and further tested.

But before we jump right into our troubleshooting, if you have other issues with your phone, make sure to drop by our troubleshooting page for we have already addressed hundreds of problems with this device since it was released. Find issues that are similar with yours and use the solutions and/or troubleshooting guides we suggested. If they don’t work or if you need further assistance, feel free to contact us by filling up our Android issues questionnaire.

Troubleshooting Galaxy S7 that won’t turn on after Nougat

The purpose of this troubleshooting is for us to know more about the problem and why it occurs. This way, we can formulated a solution that might just fix the problem.

Problem: My S7 have recently done a software update on my phone now it wont turn on at all.

Solution: When nougat update was made available, a lot of Samsung users complained about it wherein according to them they experienced various issues after the upgrade had been installed in the system like: apps could no longer be opened, can’t receive SMS and MMS, stuck in Samsung logo, could not connect to home Wifi and etc. But the good thing is, this issue can be fixed through simple troubleshooting procedures without wasting your time going to the shop to be checked by the technician. Don’t you worry this procedures these procedures won’t harm your device nor delete the important files saved on your phone if you have to follow it correctly. Here are the steps:

Step 1: The device battery might be empty, try to charge it for 10-20 minutes

Before performing any troubleshooting procedure, it is imperative to check first the condition of the battery to make sure that there is a sufficient energy to power up the components inside before you attempt to turn the device on. Doing this is also a big help to determine if electric current is perfectly flowing through the circuit board of the phone. However, if it is connected for several minutes to the charger and the device is not responding, then may be a hardware problem triggered it. You can immediately visit the nearest shop in your area so that it will be checked further by the tech.

Step 2: Force reboot the device for it may be a glitch in the system

Assuming that the device is charging normally, the next thing that you should do is to restart it. Since a new firmware has been installed, there is a tendency that lots of unclosed apps are still running in the background that conflict the general performance of the phone and prevents the system from not booting up completely. So, while connected to its charger press and hold the Power and Volume Down keys together for 10-15 seconds and wait until the device restarts. But while doing so and the device still not responding, try to do the next step.

Step 3: Try to boot your phone in Safe mode

This time, we have to check if the device can boot up completely while all third-party apps are temporarily disabled from the system. The reason of booting the device in safe mode is to figure it out if one of your downloaded applications caused the issue. If it boots up without a problem, there should be an app that triggered it. Finding and uninstalling that app is necessary to avoid the problem from occurring again on your phone. Here’s how to boot the 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.

Step 4: Boot your phone in Recovery mode and delete its system caches

Remember, this procedure will be performed if the previous methods won’t do any good to your phone. If your device refused to turn on in safe mode, then it’s time to  jump to the next mode which is the recovery mode. The purpose of doing this is to validate that the hardware components still function properly and the current is flowing normally. So, while in this mode and the device turned on, then you can  proceed to the next step by deleting its caches.

Follow these steps to boot in Recovery mode and, if necessary, wipe cache partition:

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

Assuming the phone powered on and booted up in recovery mode, the problem is half solved. The next thing you should do is try to boot it up successfully. If it still won’t boot up in normal mode successfully, then move on to the next step. However, if the phone failed to boot up in recovery mode, then you have no other choice but to send it in for repair.

Step 5: Bring back the device to its factory default

You only need to do this procedure if the phone charges properly, booted up in recovery mode successfully and wiping the cache partition didn’t yield any good result. What this does is delete all your files and data but also bring the phone back to its factory default settings. Since the phone has recently been updated, the new firmware will remain.

  1. 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.
  2. When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  3. 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.
  4. Using the Volume Down key, navigate through the options and highlight ‘wipe data / factory reset.’
  5. Once highlighted, you may press the Power key to select it.
  6. Now highlight the option ‘Yes — delete all user data’ using the Volume Down key and press the Power button to select it.
  7. Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  8. The phone will now reboot longer than usual.

But after resetting and the phone can’t still continue booting up in normal mode successfully, you have to bring it back to the store and have it checked.

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  1. I had an update 15/6/2017, half way through, I had an error messagr.. now I have a yellow triangle with an exclamation mark and the robot on his side! I’ve tried all the methods you have advised.. when I press home, volume down and power button, a message says ‘ a custom OS can cause critical problems’ etc… and only gives me the option to continue or cancel. If I cancel, my phone constantly restarts with an error message in between. If I continue, it says downloading – do not turn off target…. but it never gets past that stage until the battery dies. Please help!! I have had a cracked screen for 6 months, samsung are telling me I’ll have to pay £200 to fix, but the issue is with the software that I was advised to download! Nothing to do with the screen!

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