How To Fix Samsung Galaxy S9 Keeps Restarting Unless Plugged To Charger

The #Samsung #Galaxy #S9 is one of the two flagship models released by the South Korean company this year. It is best known for having a solid build quality made of an Aluminum frame and Gorilla Glass on the front and back. It uses a 5.8 inch Super AMOLED Infinity Display while under the hood is a Snapdragon 845 processor combined with 4GB of RAM. Although this is a solid performing device there are instances when certain issues can occur which we will be addressing today. In this latest installment of our troubleshooting series we will tackle the Galaxy S9 keeps restarting unless plugged to charger issue.

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How To Fix Samsung Galaxy S9 Keeps Restarting Unless Plugged To Charger

Problem: A few weeks ago, while working and listening to a podcast. My phone (Galaxy S9) froze and was stuttering the last word that was said on podcast. It finally rebooted and did the same thing again, but I noticed the battery kept jumping around each time the phone turned back on from 86% to 23% back to 76% and finally 44%. The next week I had it plugged in to car charger taking it off intermittently throughout the day, but ultimately keeping it charged at 86% to 100%. However when I got back to my office after about an hour, it died, rebooted and showed my homescreen and I noticed the battery life at 23% before it turned off. When I got home, I plugged it in and charged it to 100% took it off charger and tried using the flashlight where it started going into the bootloop. When I drove to my girlfriends apartment l, while on WiFi, I noticed that the phone would act somewhat normal when I would take it off charger. However eventually it would start turning itself off again and shoe various battery percentages until placed on charger again. TLDR-phone works fine on charger, but dies/continuously reboots off charger I’ve tried soft reset, wiped cache, and factory reset and its still acting up. I did notice that it was briefly bootlooping 2 or 3 times while on charger then the phone turns on and works normally only on charger. Any ideas how I can fix this before I put myself into debt for a new phone? Thanks!

Solution: Before performing any troubleshooting steps on this device it’s best to make sure that it is running on the latest software version. If an update is available then I suggest that you download and install it first.

From the way you described the problem this looks like it is already caused by a faulty hardware component, possibly the battery. However, there is still a possibility that this might be caused by a software glitch which we will be checking by doing the troubleshooting steps listed below.

Perform a soft reset

The first thing you will have to do in this case is a simulated battery pull or what is also called as a soft reset. This is usually done when a phone becomes unresponsive but is also recommended in this particular case.

  • Press and hold the Power and Volume down key for up to 45 seconds.
  • Wait as the device restarts.

Once the phone restarts check if the issue still occurs.

Check if the issue occurs in Safe Mode

An app you downloaded and installed in the phone could be causing this problem. To check if this is the case you will need to start the phone in Safe Mode since only the pre-installed apps are allowed to run in this mode.

  • Turn the phone off.
  • Press and hold the Power key past the model name screen appearing on the screen.
  • When SAMSUNG appears on the screen, release the Power key.
  • Immediately after releasing the Power key, press and hold the Volume down key.
  • Continue to hold the Volume down key until the device finishes restarting.
  • When Safe mode appears in the bottom left corner of the screen, release the Volume down key.

In case the issue does not occur in this mode then it’s likely that the problem is caused by an app you downloaded. Find out what app this is and uninstall it.

Wipe the cache partition of the phone

The phone system cached data is used to speed up the access to your phone apps. Sometimes this data can get corrupted which results in issues occurring on the device. To check if a corrupted cached data is causing the problem you will need to wipe the cache partition of the phone from the recovery mode.

  • Turn off the phone.
  • Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
  • 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).
  • Press the Volume down key to highlight “wipe cache partition.”
  • Press the Power key to select.
  • Press the Volume down key to highlight “yes” and press the Power key to select.
  • When the wipe cache partition is complete, “Reboot system now” is highlighted.
  • Press the Power key to restart the device.

Perform a factory reset

One last troubleshooting step you should consider is a factory reset. This will revert your phone back to its original factory condition. Make sure to backup your phone data before doing the reset as it will be deleted in the process.

  • Turn off the phone.
  • Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
  • When the green Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  • Press the Volume down key several times to highlight ‘wipe data / factory reset’.
  • Press Power button to select.
  • Press the Volume down key until ‘Yes — delete all user data’ is highlighted.
  • Press Power button to select and start the master reset.
  • When the master reset is complete, ‘Reboot system now’ is highlighted.
  • Press the Power key to restart the device.

In case the issue persists even after performing the troubleshooting steps listed above then this is most likely caused by a faulty hardware component, possibly the battery. The best thing to do right now is to have the phone repaired at a service center.

Feel free to send us your questions, suggestions and problems you’ve encountered while using your Android phone. We support every Android device that is available in the market today. And don’t worry, we won’t charge you a single penny for your questions. Contact us using this form. We read every message we receive but can’t guarantee a quick response. If we were able to help you, please help us spread the word by sharing our posts with your friends.

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