Causes of Galaxy Note 5 random reboot issue, other issues

Hello guys! Welcome to another post that covers some of the #GalaxyNote5 issues reported by our readers. We will be publishing more of the same posts in the coming weeks so for those who are yet to see their issues published, keep watching.

Note 5

Below are the specific topics discussed in this material:

  1. Galaxy Note 5 fell and now won’t turn back on
  2. Incoming SMS notification keeps coming back on Galaxy Note 5
  3. Galaxy Note 5 has no network signal after it got wet
  4. Galaxy Note 5 won’t turn back on
  5. Causes of Galaxy Note 5 random reboot issue
  6. Galaxy Note 5 freezing | Galaxy Note 5 not turning back on

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, or you can install our free app from Google Play Store.

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.

Problem #1: Galaxy Note 5 fell and now won’t turn back on

I have the Galaxy Note 5. I’m pretty sure I’m screwed and need a new phone but I thought I’d ask. I was at work helping a woman catch her kid when he knocked my phone out my hand and landed face down on the hard ground (no carpet). The screen won’t power on anymore and at first I was still getting notifications. I just tried to plug it in and the notification light wouldn’t even turn on to indicate it was charging. Any suggestions to get it working again? Or is it time to give up? — Deanna

Solution: Hi Deanna. To answer your question, a full hardware check must be done so we can’t say for sure if you can still get it to work again. Shock forces from a drop may or may not affect internal components or solder points. There’s no official data from Samsung how much drop forces a Note 5 can withstand so the best way to check is to look out for signs of problems. If the phone no longer responds at this time, there may be a problem with solder points with its battery or other components. The damage may also be isolated to the screen assembly only. Whatever it is, the best way to find out is by having it checked. Sometimes, damage can manifest right away in some form of performance issues as well as failure to boot. In some other cases, problems can only show after a period of time. In this case, knowing what the affected hardware might be can even get tricky even for a seasoned technician. We say you call Samsung and let them decide whether your phone lives or not. If you have no access to a Samsung repair center, bringing the phone to a third party repair shop may also work. Keep in mind though having the phone opened by a  non-Samsung technician voids the warranty, which means that even if you’ll bring it to a Samsung shop later on, they may refuse to repair it even for a fee.

Problem #2: Incoming SMS notification keeps coming back on Galaxy Note 5

I use the stock text messaging app included with my Note 5. I decided to delete all my texts messages right as I got a new message. I can pull down my task bar and see the message. Swiping left or right clears it from the screen, but it doesn’t go away. If I force stop the app, it clears the notification, but as soon as I receive or send another message, it comes back. There’s also a notification on the messaging icon on my home screen too. It’s like there’s a phantom message it wants me to open, but I can’t access. I’ve reset my phone, turned it off and back on, held volume up, power and the home key, then cleared cache partition. I’ve went to applications and cleared the app cache and storage. Nothing seems to work. — Robert

Solution: Hi Robert. There may be a firmware bug causing the issue so the next best thing to try is factory reset. Here’s how to do it:

  • Turn off your Samsung Galaxy Note 5 completely.
  • Press and hold the Volume Up and the Home buttons first, and then press and hold the Power key.
  • Keep the three buttons pressed and when ‘Samsung Galaxy Note5’ shows, release the Power key but continue holding the other two.
  • Once the Android logo shows, release both the Volume Up and Home buttons.
  • The notice ‘Installing system update’ will show on the screen for 30 to 60 seconds before the Android system recovery screen is shown with its options.
  • Use the Volume Down key to highlight the option ‘Yes — delete all user data’ and press the Power key to select it.
  • When the process is complete, use the Volume Down key to highlight the option ‘Reboot system now’ and hit the Power key to restart the phone.
  • The reboot may take a little longer to complete but don’t worry and wait for the device to become active.

Problem #3: Galaxy Note 5 has no network signal after it got wet

I just want to say that, and I’m sure plenty of others as well, are very appreciative of your services and I personally would like to thank you guys for that.

I’m using a Galaxy Note 5 with AT&T as my carrier. My issue, last Saturday, in the process of saving a kid from drowning, I jumped in the water with everything on, clothes, phone, etc. and as a result, my phone suffered water damage. I didn’t have insurance and due to water damage, the manufacturer’s warranty is void. For about two days, I had the phone in rice and now, the phone turns on and seems to be functioning very well except that I have no service. I don’t know if it’s SIM card related or something inside the phone that got damaged. I just can’t imagine that the phone works just fine except for service. If I remove the SIM card, the phone detects that it’s missing the SIM card. However, if I put the SIM card back in, I get the O with the line across it indicating no service on the status bar next to the time. Thus, do you think it could be the SIM card itself, or something with the phone as a result of water damage? I don’t have an extra SIM card to try to see if it’ll make a difference, but do you know whether or not water can affect the SIM card? Any info/advice you can office would be greatly appreciated. Thank you again. — Ram

Solution: Hi Ram. As in most water-damage cases, it’s almost always difficult to say with certainty where the real problem lies since the presence of moisture in the logic board or in a part of a circuit can lead to a string of problems. If this problem was not there prior to exposing the phone to water, then there’s high probability that some hardware components may not be working properly at this time. The problem may only be isolated to the SIM card slot module, or may be some other components like the cellular antenna and/or related chip. To do a simple check, try using another SIM card and see how it works. If the problem stays, then you can assume that your device is malfunctioning. We know you have little to no choice in the matter but we still recommend that you simply find a way to have it replaced.

Problem #4: Galaxy Note 5 won’t turn back on

My phone will not turn on, no matter what I do. I was doing work, and I had my phone plugged in to charge it for the night right next to me. Prior to this, it was working fine. My phone occasionally restarts itself (I don’t know why) but that seems to be the only problem. Anyway, so I check my phone to see what time it is and i press the main button and the screen won’t turn on. It’s plugged in and the red LED light is on, as if its charging. I just couldn’t get the lockscreen on. So I try pressing, and then holding the power button, but nothing seems to work.

All that happened was the LED light turned off. I thought it was a battery problem so I bring it to my parents. I plugged it into my computer and it said something like “USB device not recognizable, the device malfunctioned and can no longer be read” or something along the lines of that.

Is it my battery that is causing the problems? It is a software problem? I really hope it is fixable, I’m afraid of losing things i had stored on there. Please contact me ASAP, thank you for your time! — Annie

Solution: Hi Annie. Sometimes, a problem like this can be resolved by doing a simple trick — soft reset. In older Galaxy Note models, this can be done by physically removing the battery from the device. Since a Note 5 comes with a non-removable battery pack, you can soft reset it by simply pressing and holding the Power and Volume Down buttons for at least 12 seconds. Doing so will force the phone to reboot and hopefully work back to its normal operation. If your phone remains unresponsive, you have no other choice but to attempt a factory reset. We know factory reset will delete your data but it’s the only way to get back your Note 5 to work again.

Problem #5: Causes of Galaxy Note 5 random reboot issue

Good evening guys. I’m having a problem with my phone which is doing my nut in, ever since the new Android version was installed. my phone has been playing up, with shutting off, or restarting its self, and occasional no signal until you restart it manually.

I have reset my phone back to factory settings numerous amount of times to fix this the issue. However the issue has now come back is even worse with the shutting off. On Lollipop it used to shut off at 12%, now with Marshmallow it shuts off at 28/32%. I have reset my phone back to factory settings and now it turns off at 42%. I also close down all my apps after use. i have had the phone for about a year, and i don’t allow the battery to die right out, and every now and then, i will turn off the phone and charge it fully. — Cameron

Solution: Hi Cameron. Random restart issue can be due to one of multiple causes so if this problem has been happening for a while, you must do a little more of troubleshooting to isolate the true cause. Causes of random restart/reboot issue include the following:

  • erratic app/s
  • unknown firmware glitch
  • malware or virus
  • bad battery
  • overheating
  • malfunctioning hardware

Any or a combination of some items above can make an Android device restart on its own. Let’s discuss the “whys” briefly below.

Make sure you only install good apps. Okay, we know that there are hundreds of thousands of apps out there that you can install. The thing is, not all apps are created equal. Some are made by really good developers that they regularly receive updates to make them work with as many as devices and Android firmware versions as possible. A good developer ensures that come a new operating system, his or her app is fully compatible. Doing this requires resources that many developers simply don’t have. This is the main reason why many apps remain outdated when a new operating system is introduced. Many apps designed to work with an older Android version may not necessarily work with the most recent firmware you install.

Now, in some cases apps (that may be originally created with Android Lollipop in mind) may still function even if they are not designed to work with say, Android Marshmallow, but some can actually lead to conflicts. Problems arising from installing an incompatible app include random reboot, freezing, crashing, slow performance, to mention a few. This may be the reason why your problem recurs after installing two Android versions. Doing a factory reset is useless if you simply reintroduce the same set of apps afterwards. You must observe how the phone behaves after a factory reset (and without apps installed) to see the difference.

More importantly, make sure that you only install apps certified to work with whatever Android version you’re running. It’s your responsibility to also update your apps. If you are the type who install apps at whim, now is a good time to try going over the list of apps you have so you can get rid of incompatible ones.

Bad firmware. Firmware or operating system is composed of codes that can be messed by developers sometimes. Although Google tries to keep bugs to a minimum during the release of a new OS, problems can still pop up from time to time. Carriers can also introduce coding problems when they modify vanilla Android to accommodate their own services and cosmetic changes. Apparently, these problems are beyond your means to fix as you can’t correct bad codes but we still feel obligated to let you know about it for educational purposes. It’s often impossible for an average user to identify if random reboot issue is due to a bad firmware but if you have:

  • already tried a factory reset
  • exhausted all software troubleshooting
  • Identified that hardware is not to blame,

then it might make sense if you can let your carrier know about the issue. This may prompt them to let the developer know about the issues so they can recheck their codes.

In this case, you can also opt to install a known, stable custom ROM instead of using the carrier-supplied firmware.

Consider checking for malware/virus. Although we have no data of apps that can cause random reboot issue at this time, it still doesn’t mean you have to let your guard down. Viruses in smartphones are spread by apps so make sure that only install apps from reputable developers. Uninstall games from unknown developers as many of them are known to host dubious services that allows adware and trojans.

Dying battery. In older Galaxy Note models, checking if a battery is the problem is easily done by using a new one. Not so apparently with Note 5s. This means that there’s no way you’ll know what the true state of the battery is unless you pry open the phone and insert a different one. We advise against you doing it though. If you think battery is the problem, call Samsung and let them handle the replacement for you.

Keep in mind that a normal Lithium-based battery gradually loses capacity overtime and after each charging session. You should consider having the battery replaced after using the device for over a year (assuming you charge your phone at least once a day).

Check if your device is overheating. The most obvious sign that your phone is overheating is when you notice it getting unusually warm to touch. If your random reboot comes together with overheating, there must be something deeper that you must figure out. Samsung devices are designed to automatically shut down if its internal temperature reaches a certain threshold. This mechanism is implemented to prevent damaging the hardware.

Now overheating in this sense is not the issue itself but only a sign of the real problem. This problem can be due to a bad hardware like a malfunctioning CPU or another erratic component. To resolve a problem that involves overheating, you must have the phone repaired or replaced.

Malfunctioning hardware. If you’ve already tried all the things that you can do on your end and the issue remains, you must have only hardware failure to blame. Like what we mention above, you must have your device repaired or replaced.

Problem #6: Galaxy Note 5 freezing | Galaxy Note 5 not turning back on

Hello. I am a Note 5 user and I purchased the device in January in Australia when I was working there as a doctor. I have now moved to Saudi Arabia and it has been very hot and the phone was fine for 3 weeks. but the last 2 weeks I have to keep on rebooting it especially when I go to hot weather. it would freeze up and go black.

I did a full back up and restore and the problem is still there. I have now tried to do a factory reset and went through the option of factory reset and then rebooted now but now my phone is not turning on at all and all I have is a black screen. Can you please please help as I am only five weeks in this country and I really need my phone to sort my life? Thanks… Will be checking mail regularly… — Asim

Solution: Hi Asim. We hope this post reaches you in time. We don’t send responses to emails so hopefully you’ll find this answer.

Now, frankly speaking, there’s little to nothing that you we can do to help if a device won’t turn on. The only thing that you can try right now is to check if your Note 5 will still boot to other modes. This means trying different hardware button combinations.

The first one you should try is boot your phone in Note 5. here’s how:

  • Turn off the phone completely.
  • Press and hold the Power key.
  • Once ‘Samsung Galaxy Note5’ shows, release the Power key and immediately press and hold the Volume Down button.
  • The phone will restart but keep the Vol Down button pressed.
  • Once the phone has finished restarting, ‘Safe mode’ will be display in the lower-left corner of the screen.
  • You may now release the Volume Down button.

Safe mode is just like normal mode without the third party apps. If you can boot your phone in this mode, make sure that you immediately create a backup of your personal data.

Another boot mode that you want to try is Recovery mode. In this mode, you’ll have the option to either wipe the cache partition or do a factory reset. If your phone only boots in this mode, there’s no way to create a backup of your personal data. Here’s how to do it:

  • Turn off your Samsung Galaxy Note 5 completely.
  • Press and hold the Volume Up and the Home buttons first, and then press and hold the Power key.
  • Keep the three buttons pressed and when ‘Samsung Galaxy Note5’ shows, release the Power key but continue holding the other two.
  • Once the Android logo shows, release both the Volume Up and Home buttons.

Finally, if you can’t turn the phone on to either safe mode or recovery mode, the last thing that you want to do is try download mode. Here’s how:

  • Turn off your Samsung Galaxy Note 5 completely.
  • Press and hold the Volume Down and the Home buttons first, and then press and hold the Power key.
  • Keep the three buttons pressed and when ‘Samsung Galaxy Note5’ shows, release the Power key but continue holding the other two.
  • Once the Android logo shows, release both the Volume Down and Home buttons.

Before you try booting your phone to any of these modes, make sure that you leave your phone charged for at least 30 minutes.

If your Note 5 still won’t respond, consider having it replaced.


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One Reply to “Causes of Galaxy Note 5 random reboot issue, other issues”

  1. Dear concern,
    I have Galaxy Note-5. I observed that some time my sim messages, incoming and outgoing calls are blocked means not receiving. Then i restart my mobile then i receiving the old sms and miss called. What is this issue which i have in my mobile.
    It is requesting to advise about the solution for this issue.

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