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Solution for Galaxy Note 4 randomly restart issue, other boot problems

Note 4

The #GalaxyNote4 is reputed to be a solid flagship phone from #Samsung and it has indeed proven itself since it was released last year. It is however not immune to the usual problem plaguing almost all smartphones of its generation — boot up issues. Power-related or boot issues can take many forms and may be the products of a number of factors. We discuss some of these issues in this post today as well as some of their known effective counters so help yourself.

Below are the specific issues in this post:

  1. Galaxy Note 4 reverts to swipe lock constantly
  2. Galaxy Note 4 boot loop issue
  3. Galaxy Note 4 battery drain issue
  4. Solution for Galaxy Note 4 randomly restart issue
  5. Solution for Galaxy Note 4 “black screen of death” issue

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.


Problem #1: Galaxy Note 4 reverts to swipe lock constantly

Sorry to bother you.

I recently noticed after having a bunch of apps go through an update that my screen lock goes from needing a PIN to merely needing to be swiped. I changed it back,  then 8 to10 hours later, it goes back to only needing to be swiped. On Saturday night, I reset it to the PIN…at which point it would not recognize it and I was locked out of my phone. (I was thankful that it would end up defaulting to the swipe as it did on Sunday morning.)

I changed to using just a pattern and that seems to be holding.

I did remove the battery and keep it off for about an hour on Saturday afternoon (maybe the lock out wad is easy of getting back at me). And advice would be appreciated.

Thank you and God bless. — Gregory

Solution: Hi Gregory. Updates can sometimes lead to unforeseen problems with other apps or phone features. The first thing you can do to fix the issue is to clear the system cache. Here’s how to do it:

  • Turn off your Samsung Galaxy Note 4 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 Note 4’ 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 ‘wipe cache partition’ 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.

If nothing happens after wiping the cache, make sure to perform a factory reset to revert all software to default settings. Make sure to create a copy of your personal information before you proceed with this procedure.

Here are the steps to do a factory reset:

  • Turn off your Samsung Galaxy Note 4 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 Note 4’ 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 #2: Galaxy Note 4 boot loop issue

Hi. I am hoping you can shed some light into my frustrating situation I have got myself into with my Galaxy Note 4 (N910F). The phone had been rooted and was working quite the thing until one day browsing Facebook it froze on me, I thought nothing of it at the time and re booted my phone… only for it now to go into a boot loop soft bricked.
I have tried numerous internet solution and different types of flashing via Odin and micro SD card to no avail and still on a boot loop. What does this say about my phone or am I missing something simple and can be resolved. your help would much be appreciated. Thanks. —
Ian

Solution: Hi Ian. Boot loop issue can be caused by a number of reasons including operating system corruption, incompatible ROM, faulty firmware, among others. Each one usually requires a particular set of solution to get the phone back to its working order but one of the most effective solutions to fix boot loop problem is by flashing the stock firmware. If you’ve already tried it and it didn’t work either, there might be another reason that you need to identify yourself.

Another good way to fix boot loop is by going to recovery mode then performing a factory reset. We’ve seen it fix many boot loop problems, especially if the cause lies on the firmware itself.

If these two handy solutions will not make any difference, the problem might actually lie deep inside some the phone itself, which can mean anything ranging from the system that manages the initial boot up process to hardware failure. In this case, you’re better off asking assistance from professionals who can physically check the phone so they can run proper diagnostics.

If still under warranty, you might want to simply ask for replacement.

Problem #3: Galaxy Note 4 battery drain issue

I have Galaxy Note 4 and it looks like the continuous WIFI scanning problem has started after I downloaded and installed the huge fixes 677 MB size. I turned off all the check boxes, switch etc. still no luck. It drains the battery like crazy.

Ironically, at home WIFI (relatively weaker signal) – still continuously scans but if I charge it to 100% at 10 PM by 7 AM it is at 98%.  But, at work the signal strength says strong to very strong, but the battery goes from say 93% at 8 AM to 50% by 4 PM.  

I use my Galaxy Note 4 phone very little and I don’t get that many texts or anything. I use my desk phone(land line) mostly. What is the mystery? — Pundi

Solution: Hi Pundi. As mentioned above, updates can sometimes result to new problems instead of fixing existing ones. That’s because of many factors but we won’t dwell on what those are. Let’s focus instead on what you can do to fix the problem. Just like what we recommend to Gregory, you need to wipe the cache partition and do a factory reset first to ensure that you minimize possible firmware-related problems.

Now after doing a factory reset, the next best thing to do is verify if one of your apps is the reason for battery drain. Keep in mind that not all apps are optimized to work with the most recent update your device received. Even after over a year, thousands of apps in Google Play Store are still not compatible with Android 5.0 and the succeeding updates. Installing an app that hasn’t been fully tested for a particular device running a certain operating system can sometimes be problematic.

So what we’re saying is you have to make sure that you only install constantly updated applications. Be especially wary of installing games and other productivity apps as many of them are not fully compatible with newer operating system updates. Stick with mainstream apps and get rid of outdated ones. If you are not sure whether an app is causing the problem, try to remove it from the system and observe how the phone behaves for some time to see the difference.

Of course, using some smarts to minimize battery consumption is always a must-do for today’s power hungry smartphones. Try to visit our previous post originally written for Galaxy S4 and S5 on how to conserve precious battery power. The general principles in this post are applicable for your phone as well.

Problem #4: Solution for Galaxy Note 4 randomly restart issue

I recently purchased a Samsung Note 4 (SM N910T) for $250 from a guy on Craigslist after saving up money to buy it, but it keeps turning off out of nowhere…though it typically occurs when the device gets warm…It is in like new condition with box and good IMEI and I didn’t know it had problems turning off before I bought it. But after using it more the phone was having problems before I rooted it.  After I rooted it, and after I odined the earliest version of KitKat of the phone.. The turning off occurs at any time, during boot, during flashing TWRP, during normal usage of phone, anytime.

I recently purchased a brand new OEM Samsung Note 4 battery and I was hoping it would solve m problems, but it still turned off. Please help me.. >_< — Andrew

Solution: Hi Andrew. Random reboot issue can be due to a number of reasons including bad apps, faulty or loose battery, corrupted operating system, or defective hardware. Your first task therefore is to identify which one is possibly causing this trouble. To do that, we recommend that you try all the software troubleshooting first. If nothing changes after doing all the basic stuff, you can assume that you have a hardware issue is behind this problem.

Start by restarting the phone in safe mode for at least 24 hours. This will help you isolate if the problem is due to an app. To do that, just follow these steps:

  • Turn the device off.
  • Press and hold the Power and Volume down key.
  • Release the Power key when the Samsung logo appears but continue to hold the Volume down key until the device finishes restarting.
  • Safe mode will display in the bottom left corner of the screen.
  • Release the Volume down key when you see Safe Mode.

If the issue fails to occur while in safe mode, start uninstalling third party apps until you have eliminated the problem.

Sometimes, booting in safe mode won’t really help so you also need to clear the phone’s system cache and do a factory reset (steps provided above).

Since you’ve tried flashing different ROMs, we recommend that you re-install the stock firmware to see a difference.

If your Note 4 continues to restart after doing all the software troubleshooting, make sure to check that the battery is properly plugged in inside. Loose battery or a defective battery connector can also cause the phone to lose power. If that won’t change anything, you must have a defective hardware, which means that any component may be failing. Have the phone checked for repair, or simply ask for a refund (if still possible).

Problem #5: Solution for Galaxy Note 4 “black screen of death” issue

This is more of an information piece for you, as I have already resolved my issue.

This weekend I noticed I was getting close to maxing out my internal memory. I downloaded a podcast, began listening to it, and my phone black screened. I was able to hard reset it, but it black screened again shortly thereafter, and continued this pattern until it would no longer come back on at all. After going out an buying a new phone I was able to come to the realization that I had maxed my memory out and it would no longer start up.

I tried the holding down my power button to clear the cache and all of the other suggestions. I finally left my battery off for 30-60 minutes, removed my sim card and my sd card, and was then able to get the phone to start up long enough for me to go in and clear some of the data out and now the phone is working just fine.

I thought I would pass this along for you to add to your page about the ‘Black screen of death”. — Gerri

Solution: Hi Gerri. We appreciate the effort to let us know about your self discovered solution. Boot up problems can sometimes be caused by a lot of factors that it’s difficult to mention them in a rather limited space of our daily troubleshooting posts. We’re glad that you managed to get your device working by doing simple solutions. We are sure that Android community will try your solutions with their own issues as well. We will also recommend them in our future posts.

 


 

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