How To Fix Samsung Galaxy S9+ Not Working Unless Plugged To Charger

The #Samsung #Galaxy #S9+ is a flagship phone released this year which is the bigger version of the S9 model. This phone has an Aluminum frame with Gorilla Glass on both the front and back. It uses a 6.2 inch Super AMOLED display which is great to use for viewing multimedia content. Under the hood is a Snapdragon 845  processor which when paired with 6GB of RAM allows the device to run apps smoothly. Although this is a solid performing phone 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+ not working unless connected to charger issue.

If you own a Samsung Galaxy S9+ or any other Android device for that matter then feel free to contact us using this form. We will be more than happy to assist you with any concern that you may have with your device. This is a free service we are offering with no strings attached. We however ask that when you do contact us try to be as detailed as possible so that an accurate assessment can be made and the correct solution can be given.  

How To Fix Samsung Galaxy S9+ Not Working Unless Plugged To Charger

Problem: Hi I’m using a Samsung galaxy S9+ operating on Oreo I got it a couple weeks ago .It was working just fine until a day ago when I tried to use the camera the phone went off and back on and it was stuck in a loop the phone wouldn’t go past the Samsung logo unless it was plugged in to a charger. When it charges up to 100% the minute I turn it on it says it’s only at 76% and goes off again and gets stuck in a loop, I tried calibrating it but it didn’t help I tried to factory reset the phone it didn’t help I need to buy a new battery? I haven’t had a software update since last year so I’m not sure why the phone is behaving this way.

Solution: In most cases where the phone does not turn on unless it is connected to a charger the problem is usually caused by a faulty battery or power IC. You can however check if other factors could be causing this problem by performing the troubleshooting steps listed below.

Clean the charging port of the S9+

The first thing you will want to do in this case is to make sure that the phone has sufficient charge and in order to do this you should make sure that the phone charges properly. Dirt or debris stuck in the charging port of the phone could prevent the device from being charged which is why you will need to clean this port using a can of compressed air.

Charge the S9+

Use the wall charger of the phone to fully charge it. You will know when the phone has been fully charged if its LED light is glowing green. In case the phone does not charge then try using a different charging cord and wall charger. You should also check if the phone can charge from a computer USB port. If you have a wireless charger then you can use this as well.

Perform a soft reset on the S9+

Once the phone has been fully charged it’s time to do a soft reset. Press and hold the Power and Volume down key for up to 45 seconds. Your phone should restart after this. Check if the issue still occurs.

Start the S9+ in Safe Mode

There are instances when an app you downloaded could be causing the problem. The best way to check if this is what’s causing the problem is to start the phone in Safe Mode as only the pre-installed apps are allowed to ru 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.

If the problem does not occur in this mode then it could be caused by an app you downloaded. Find out what app this is and uninstall it.

Perform a factory reset on the S9+ using the hardware keys

One last troubleshooting step that you should perform is a factory reset. If you are able to backup your phone data before doing a factory reset then you should do it 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 above troubleshooting steps fails to fix the problem then you will have to bring the phone to a service center and have it checked as this could already be caused by a faulty hardware component.

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Chad Buenaflor

Chad has been in the tech industry since 2000. He has a degree in Electronics Engineering and is interested in the hardware and software side of technology. Initially working for a Japanese semiconductor company as a Test Engineer for nearly 10 years, he then pursued his passion for internet technology by working for the support team of Time Warner Cable then finally joining TheDroidGuy as one of their troubleshooting and tech writers. On his free time he plays his favorite games on his PC, Xbox Series X, and Android phone. Contact me at Email

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