Samsung Galaxy J5 turned off on its own, became unresponsive and won’t turn back on [Troubleshooting Guide]

Your Samsung Galaxy J5 may be a smartphone but it shouldn’t do something on its own without the user initiating it. With that said, if it turned off on its own, then you can almost expect something unusual is happening to it or there might have been something that triggered the issue. If the phone turned off by itself but turns back on when you press the power key, then we may be able to consider it as a minor glitch. However, if it becomes unresponsive and won’t turn back on like what some of our readers reported, then it’s something we need to look into.

In this post, we will try to tackle this problem to determine if it’s a minor issue or a serious one that needs immediate technical attention. As a user, there are some procedures you can do on your own to try and fix the problem but if everything fails, then there are always technicians that can help you address the problem. Continue reading as this post may be able to help you.

For those who are looking for a solution to a different problem, make sure you drop by our Galaxy J5 troubleshooting page for we have already addressed some of the most common issues with this phone. Browse through the page to find issues that are similar with yours and feel free to use our solutions. If they don’t work or if you need further assistance from us, you can always contact us by filling up our Android issues questionnaire and hitting submit.

Troubleshooting a Galaxy J5 that won’t turn back on and totally unresponsive

The main purpose of this troubleshooting guide is to bring your phone back to life so we will try to do everything that can make it turn back on or at least, respond. If it’s just an issue with the firmware or applications, we may be able to fix it however, if it’s a problem with the hardware, then more tests must be done to determine the gravity of the problem and you need a technician who can perform physical inspection. Now, let’s go to our troubleshooting…

Perform the Soft Reset procedure on your phone

If it were a phone with a removable battery, then you can try pulling the battery out to refresh the phone’s memory. It’s one of the most effective methods in fixing system crashes and other firmware related glitches. Sadly, your Galaxy J5 has a non-removable battery so you can’t do such procedure. However, there’s a new method that would simulate battery disconnect which has the same effects as with the battery pull–forced reset.

Just press and hold the Volume Down and the Power keys simultaneously for 10 seconds. Assuming this problem is due to a system crash or any minor firmware-related issues and that there’s enough battery left, your phone should boot up normally and it might be the only thing you need to do.

Do this procedure at least a couple of times to make sure you’re doing it right. You may press and hold the Volume Down button first and without letting go of it press and hold the Power key. After trying it a few times and the device doesn’t boot up, then move on to the next step.

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Make sure there’s no sign of liquid or physical damage

If the forced reset failed to fix the problem, it’s imperative that you check your phone for physical and liquid damages. As to the physical aspect, any force that would render the phone useless should leave a mark on the outside; it may be in the form of scratches or dents. Needless to say, it’s easier to know if the problem has been caused by physical damage.

As to the water damage, the first thing you need to check is the USB/charger port because it’s the main entry point. The phone got splashed with or dipped in water, you should see some trace of moisture in it. You may use a cotton swab to clean the area or you may insert a small piece of tissue paper to absorb possible droplets of liquid. Once you’re satisfied that the port is dry, take a look at the Liquid Damage Indicator (LDI) to know if water has found its way into your phone.

Remove the SIM card tray and look into the slot to find a small sticker. If it’s white, then your phone is free from liquid damage otherwise, you may need to bring it to the shop to have a tech take a look at it. Do the same thing if the phone has been dropped on a hard pavement prior to the problem.

On the other, if the phone doesn’t show any signs of physical and/or liquid damage, move on to the next step to continue your troubleshooting.

Try charging your Galaxy J5

It’s possible that your phone’s battery has been drained completely that’s why your phone turned off completely and won’t turn back on. I’m not sure if you’ve already tried charging your phone but regardless whether you’ve already tried it or not, connect your phone to its charger that’s plugged into a working wall outlet. Even if it doesn’t immediately show the charging signs, leave it plugged in for 10 minutes. However, if it does heat up even if it’s not showing the charging signs, disconnect the phone from its charger immediately and send it to the tech for further examination.

After 10 minutes of being plugged in and it still doesn’t show the charging signs, perform the forced reset once again but this time while the phone is plugged in. If the phone is still unresponsive, then try the reset of the steps below but if it does power on, then the problem may have been due to a drained battery. However, continue observing your phone for other concerns.

Attempt to run the phone in safe mode

There were a few cases I’ve personally witnessed wherein a phone became unresponsive due to some apps that kept on crashing. A forced reboot may be able to fix it but there are times when you really have to run the phone in its bare bones and to rule this possibility out, try running your Galaxy J5 in safe mode to see if it’s successful:

  1. Press and hold the Power key past the screen with the device name.
  2. When ‘SAMSUNG’ appears on the screen, release the Power key.
  3. Immediately after releasing the Power key, press and hold the Volume down key.
  4. Continue to hold the Volume down key until the device finishes restarting.
  5. Safe mode will display in the bottom left corner of the screen.
  6. Release the Volume down key when you see ‘Safe Mode’.

If the phone successfully booted up in this mode, then we can say at this point that the problem is already solved. The next thing you have to do is find the app that’s causing the problem and uninstall it.

  1. From any Home screen, tap the Apps icon.
  2. Tap Settings.
  3. Tap Applications.
  4. Tap Application manager.
  5. Tap the desired application
  6. Tap Uninstall.
  7. Tap Uninstall again to confirm.

However, if your J5 still won’t respond even if you tried starting it up in safe mode, then try the next step.

Try running it up in Recovery Mode

This is another environment that your phone may be able to boot up into assuming its hardware is fine. All the usual interface you see when the phone boots up normally won’t be loaded however, all hardware components will be powered up. If the phone can successfully boot up in this mode, you can do a couple of things that might just bring your phone back to its normal operation. Try doing the procedures below…

Boot J5 in Recovery Mode and wipe cache partition

Wiping the cache partition will delete all system caches but once the phone boots up successfully, they will be replaced with new ones and this is done automatically. What you have to do is boot the phone in recovery mode and wipe the cache partition:

  1. Press and hold the Volume Up key and the Home key, then press and hold the Power key.
  2. When the device logo screen displays, release only the Power key
  3. When the Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  4. Press the Volume down key several times key to highlight ‘wipe cache partition.’
  5. Press the Power key to select.
  6. Press the Volume down key to highlight ‘yes’ and press the Power key to select.
  7. When the wipe cache partition is complete, ‘Reboot system now’ is highlighted.
  8. Press the Power key to restart the device.

Assuming the phone successfully booted up in recovery mode but the phone has difficulty booting up, then you have to do the next one.

Reboot phone in Recovery mode and do the master reset

This will delete all your personal files and data from your phone but it’s very effective in fixing firmware-related issues. This is your last resort and you have to do this if the phone gets stuck while booting up after wiping the cache partition.

  1. Turn off the device.
  2. Press and hold the Volume Up key and the Home key, then press and hold the Power key.
  3. When the device logo screen displays, release only the Power key
  4. When the Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  5. Press the Volume down key several times key to highlight ‘wipe data / factory reset.’
  6. Press Power button to select.
  7. Press the Volume down key until ‘Yes — delete all user data’ is highlighted.
  8. Press Power button to select and start the master reset.
  9. When the master reset is complete, ‘Reboot system now’ is highlighted.
  10. Press the Power key to restart the device.

However, after all of this and the phone remained unresponsive, then you will need a technician who will check it up for you.

I hope this troubleshooting guide can help you someway, somehow. If you still need our help after this, then feel free to contact us.

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