Samsung Galaxy S6 Edge keeps restarting, not charging & won’t turn on after Marshmallow update

There are three most common problems Samsung Galaxy S6 Edge (#GalaxyS6Edge #S6Edge) owners reported shortly after the Android 6.0.1 #Marshmallow update, namely: random / frequent reboots, not charging and won’t turn on. More often, random reboots are firmware-related issues and the other two are power-related issues. So basically, these issues will be dealt with differently.


I will guide you on how to thoroughly troubleshoot these issues to hopefully fix them. Read on to learn more about each of the signs and possible causes of these problems. But please note that the very purpose of our troubleshooting is to know the problem. There’s no guaranteed fix here especially if the issue is caused by a hardware problem.

Before going any further, if you have other issues with your S6 Edge, visit our troubleshooting page as it contains hundreds of issue we already addressed. Find ones that are similar to what you have and use the solutions. You may also contact us directly if ever you need further assistance. Just fill up this questionnaire accurately and we will help you find a solution to your problem.

Troubleshooting Random Reboots Issues with S6 Edge

It happens without warning; your phone just shut itself off and then come back on. There’s also no apparent reason as to why the device does it and to top it all, it happens randomly. So, there are times when you’re in a middle of a call and the phone reboots leaving the other party wondering if you intentionally disconnected it. Sometimes though, the problem shows some signs like:

  • The device freezes for a few seconds then shuts off
  • Some apps crashes before the reboot
  • The screen goes black as if the phone turned off but the LED notification lights up

This kind of issue doesn’t happen for no reason at all and based on reports we received before, here are some of the possible causes:

  • Some cache and data got corrupted during an update process
  • One or two apps may have gone rogue causing system issues
  • The system crashes due to insufficient storage, too may apps using RAM, built-in features crash, etc
  • Corrupt firmware or some of its files missing

Just before we jump into our troubleshooting, here’s a message sent by our reader complaining about this problem:

Hey guys. I hope you have a solution to this problem. My Galaxy S6 Edge just got updated to Marshmallow, which I’m happy about. However, there seems to be a problem with it because now, my phone would just restart itself and it’s unpredictable. I can’t see a pattern, it just restarts. What’s wrong with it? Is there something I can do to fix it? Thanks!

If you’re currently having this issue, here’s what you should do:

Step 1: Isolate whether the problem is caused by a third-party or pre-installed app

You can do so by booting your device in safe mode to temporarily disable all third-party apps. This procedure doesn’t fix the problem but gives you an idea what’s causing it.

If it still occurs in safe mode, then it could be a pre-installed app that’s causing it or perhaps, a more serious firmware issue. However, if it doesn’t occur in safe mode, then one or some of your downloaded apps is the culprit. Try to find the app and disable or uninstall it. You may start your app troubleshooting from the most recently download applications.

In case you’re wondering how to boot your S6 Edge in safe mode, here are the steps:

  1. Turn off your Galaxy S6 Edge.
  2. Press and hold the Power key.
  3. When ‘Samsung Galaxy S6 Edge’ appears, immediately release the Power key and then press and hold the Volume Down button.
  4. Continue holding the Volume Down button until the phone finishes the restart.
  5. When you see Safe Mode on the lower left corner of the screen, release the button.

Step 2: Delete the system cache especially if the problem occurred after an update

System caches can easily get corrupted when there is a major update. It’s because the files created by the previous system will become obsolete. However, the new system may still use them and that would cause some inconsistencies in the device’s operation. Therefore, it’s better to just delete all of them so that the new system will create caches that are compatible with it and here’s how you do it:

  1. Turn off the device.
  2. Press and hold the following three buttons at the same time: Volume Up key, Home key, and Power key.
  3. When the phone vibrates, release the Power key but continue to press and hold the Volume Up key and the Home key.
  4. When the Android System Recovery screen appears, release the Volume Up and Home keys.
  5. Press the Volume Down key to highlight ‘wipe cache partition.’
  6. 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.

Wiping the cache partition is almost the same as the factory reset only that it’s the caches that get deleted and not the data. So, basically, if the problem is with the system cache, the procedure above will fix the problem. If the issue persists, however, then proceed to the next step.

Step 3: Perform the master reset to delete data and reformat data partition

If wiping the cache partition didn’t yield some results, then it’s time you step up your troubleshooting and this time, you need to delete all data stored in the data partition. But before you actually do it, you need to backup files you don’t want to lose, your contacts, pictures, videos, etc., then remove your Google account and disable the screen lock security so as not to trip the FRP (Factory Reset Protection).

  1. Turn off your Samsung Galaxy S6 Edge.
  2. Press and hold the Volume Up, Home and Power keys together.
  3. When the device powers on and displays ‘Power on logo’, release all keys and the Android icon will appear on the screen.
  4. Wait until the Android Recovery Screen appears after about 30 seconds.
  5. Using the Volume Down key, highlight the option, ‘wipe data/factory reset’ and press the Power key to select it.
  6. Press the Vol Down button again until the option ‘Yes — delete all user data’ is highlighted and then press the Power key to select it.
  7. After the reset is complete, highlight ‘Reboot system now’ and hit the Power key to restart the phone.

This procedure is pretty much the same in aspects as with the factory reset however, it does a little bit more by reformatting both the data and cache partitions, which means all files in those directories will be deleted. So, any corrupt files that couldn’t be deleted by factory reset will be taken care of by this procedure.

Step 4: Seek further assistance from a technician if the reset failed

The master reset was your last resort. If it failed, then it’s time you had the phone checked by a technician. For us savvy enough, we can just manually re-install the firmware to take care of this problem, however, the steps are tricky and the entire procedure itself is risky. If you’re a beginner, you may end up messing the device even more, so let the tech handle it for you.

I hope that these steps could help you fix the random reboots issue after the marshmallow update.

Troubleshooting Random Not Charging Issues with S6 Edge

The not charging issue is often very complicated to troubleshoot, however, since it occurred shortly after updating the S6 Edge to Marshmallow, it might be just another firmware issue. Let’s try to take a look at some signs of this problem:

  • The device won’t respond when plugged in or placed on top of the charging pad
  • Wireless charging works but not if plugged in
  • The device shows the charging icon for a second then disappears and reappears endlessly

While it occurred after an update, there’s still a chance it’s an accessory or hardware issue. So, let’s list down all possible causes of a not charging issue:

  • The system crashed preventing the battery from charging normally
  • The power adapter or charger got damaged for some reason
  • The USB cable is broken or the owner uses a third-party cord
  • The phone’s USB port is loose and/or damaged
  • Damaged battery
  • Serious hardware issue

Here’s one of the messages we received from our readers having this problem:

My phone’s not charging. The problem started after an update. It’s a Galaxy S6 Edge phone that I purchased about a couple of months ago. I already did a few updates prior to marshmallow and all of them were successful and I never encountered any issues. The recent update, however, was successful but it prevented my device from charging, at least, via USB. The phone still charges wirelessly, though. Help me please.”

Now, let’s jump into our step-by-step troubleshooting instructions:

Step 1: Force restart your Galaxy S6 Edge

This step is to rule out the possibility that the problem is caused by a simple system crash, which happens all the time. The firmware has a big role in the charging process so if it crashes, charging is almost impossible to do.

To do this just press and hold the Volume Down and Power keys together for 10 to 15 seconds. The phone would either reboot if it still has enough battery or the screen flickers. If it’s the latter, then plug the charger in and it should charge now.

Step 2: Plug the phone in or connect to your computer to see if it responds

What does the phone do when you connect your charger? If the device is off, there are two basic responses; the LED indicator lights up (regardless whether it’s green or red), and the screen shows the usual charging icon. If none of these things show, try connecting your phone to a computer’s USB port. While computers don’t give out as much current as the original charger, the phone should still respond if it senses that current is flowing through the cable down to its port and would show the same signs. If it doesn’t respond, then proceed to the next step.

Step 3: Use a different USB cable that you know isn’t broken

That’s right! At this point, the suspect is the cable so rule this possibility out by using a different cord. As you know, the cable is the only thing that bridges your phone and the charger if it’s broken, then current won’t flow.

If the phone still won’t respond even with a different cable, then there’s a chance the problem is with the USB port of your device.

Step 4: Try to see if the USB port is loose or has bent pins

Plug in the cable to the port and try moving it up and down, then sideways. If there’s some kind of a play, it’s a loose connection. You can try plugging the charger again and then try to move the end of the cable attached to your phone until it responds. For loose connection issues, you have to position or hold the phone or the cable at a certain angle in order to regain contact. But if it’s not the case, then the last step may take care of it.

Step 5: Send the phone in for checkup and/or repair

You’ve already done everything you can to charge the phone to no avail. So, it’s time you sent the phone to a technician who can conduct further tests and fix the problem.

Do not open the phone by yourself as you’ll void the warranty.

I hope this helps.

Troubleshooting Won’t Turn On Issues with S6 Edge

This issue has always been very common to Galaxy device owners. It ranges from firmware issue to a more serious hardware problem but in this case wherein it started after an update, it is almost certain it’s a firmware issue. To give you an idea how it manifests, here are some signs you may want to take note:

  • Screen is black but LED indicator is lit
  • Phone turned off and won’t come back on
  • Phone turned off and starts on its own but can’t continue booting
  • Device won’t respond when the Power button is pressed
  • Won’t charge, won’t turn on, etc…

It could be a firmware issue if it started after a major update but you just could rule out the possibility that it’s a hardware problem. So, here’s the most common causes of this problem:

  • The firmware update is corrupt or some files are missing
  • The system may have crashed shortly after the update leaving the device unresponsive
  • The device may have suffered from either liquid or physical damage
  • Failed rooting process or flashing of custom ROM soft-bricked the device
  • Battery is dead
  • Power button is stuck

Here’s one of the issues we received:

I got an S6 Edge on contract and there was this update. I downloaded it and it was successful. The device rebooted successfully but all of the sudden, the phone turned off and now it won’t turn back on. I am sure the battery is between 90 and 95% because I fully-charged it before I downloaded the update. Please help me fix this problem or tell me what to do. Thanks a lot in advance.

Here’s what you should do:

Step 1: Plug the charger and see if the phone charges

Do this to know if the phone somehow responds when plugged in because if it does, there’s a big chance you can fix it on your own. Otherwise, try to do the next step.

Step 2: Try to force reboot your S6 Edge

It might just be a simple system crash, so press and hold the Volume Down and Power keys for 10 seconds and see if it reboots. If not, try to plug the charger again and see if the device responds. If still no, then proceed to more complicated procedures.

Step 3: Try booting the device in safe mode

Just try it to see if the system boots up with all third-party apps and services temporarily disabled. There are times when apps go rogue and crash. When it happens, the system may be affected preventing it from booting or operating normally. Disabling those apps may just fix the issue.

Step 4: Try booting your phone recovery mode

If the safe mode remedy didn’t work, it’s time you did the recovery mode remedy. When in recovery mode, the Android GUI won’t be loaded, however, all necessary hardware components will be powered up to load the low-level system that allows you to do some system-related procedures. So, if the problem was caused by a firmware issue, it should, at least, boot in recovery mode.

  1. Turn off your Samsung Galaxy S6 Edge.
  2. Press and hold the Volume Up, Home and Power keys together.
  3. When the device powers on and displays ‘Power on logo’, release all keys and the Android icon will appear on the screen.
  4. Wait until the Android Recovery Screen appears after about 30 seconds.

Step 5: Have it checked by tech

If it failed to boot in recovery mode, it’s time you sent it in for further checkup and/or repair. You shouldn’t open it by yourself as the warranty will become void.

For more information on how to troubleshoot this problem, read this post: How to fix Samsung Galaxy S6 Edge that won’t turn on [Troubleshooting Guide].

Let us know if these guides helped you by leaving a comment below.

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