Solved Samsung Galaxy S8+ Not Turning On After System Update

The #Samsung #Galaxy #S8+ is a premium Android smartphone released last year that is best known for its large 6.2 inch Super AMOLED display that has an 18.5:9 aspect ratio and very thin bezels. This phone uses a powerful Snapdragon 835 or Exynos 8895 processor combined with 4GB of RAM allowing it to run any app 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 S8+ not turning on after system update issue and other related problems.

If you own a Samsung Galaxy S8+ 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.  

If you would like to browse the previous parts in this series then check out this link.  

S8+ Not Turning On After System Update

Problem: I have gone through 100% of your online guide to troubleshooting the phone on this issue.  Please help. (I am sorry I do not know the Android Version below due to not being able to get into the settings to look) My Galaxy S8+ will not turn on after a system update on 3/24/2018.  I had a BEAUTIFULLY working phone, and I put off the normal device update icon for about a day as I was working and away from my charger. After I charged the phone I let the device update….I let it do the update without touching it, and I noticed it start rebooting over and over, making it all the way to the lock screen and restarting.  This self rebooting process looped for about an hour…so I decided to try to reboot it on safe mode. It restarted with the safe mode icon on the bottom left, then started rebooting on a loop (each reboot after my safe mode reboot was not on safe mode, so…same problem…). Then I held the power key and the volume down as this was the only way to bring it to a mode where I could select turning the phone off.  Phone turned off fine. I tried several times restarting normally, and the phone resumed it’s looped booting…Then I wiped the cache partition in Recovery Mode. Then I started it in safe mode, and the phone started its original reboot loop as soon as it hit the lock screen…so I held the down volume and power key and selected power off and the phone powered off without issue again. I then tried restarting the phone several times on safe mode, same self looped restart problem resumed….

Then I brought the device in Recovery mode to Wipe data/factory reset.  I selected “yes” and “Reboot system now”

Same Problem.  

This is what I see in Recovery Mode:

At the top of the device reads:

Android Recovery


  1. 0. 0/R16NW/G955USQU2CRB9

At the bottom of the device reads the following:

#fail to open recovery_cause(No such file or directory)#

#Reboot Recovery Cause is [UNKNOWN]#


File-Based OTA

Supported API:  3

# MANUAL MODE v1.0.0#

remove failed dir  ‘/system/carrier/ATT/priv-app/AttIqi_ATT’ (No such file or directory)

E: [libfs_mgr]Error fetching verity device number: No such device or address

E: [libfs_mgr]Couldn’t get verity device number!

E: [libfs_mgr]Error removing device mapping: No such device or address

Successfully verified dmverity hash tree

Solution: It looks like the update might have corrupted the phone software. Since performing a factory reset does not work in this case then you should consider flashing the phone with its updated stock firmware file using Odin. You can get the firmware file from the Sammobile website which should also have the instructions on how to flash your phone.

S8+ Black Screen With Green Light

Problem: I have a Samsung S8 plus.  When I tried to turn it on, it won’t turn on, the screen is black but there is a lit green button on the top left (above the Samsung sign) of the cell phone.  I tried trouble shooting it following all the various steps shown in the website but nothing worked. Please help me because I have pictures and docs in there that I desperately need to retrieve.

Solution: If the green light is blinking then this will usually mean that the phone is fully charged. If the green light is steady then this usually means that the phone is charging. If your phone is not connected to a charger this time then we should first check if the problem is caused by a software glitch by following the troubleshooting steps listed below.

  • Press and hold both power and volume down buttons for at least 10 seconds. Your phone should reboot after this.
  • Try starting the phone in Safe Mode. If you are able to access this mode then the problem could be caused by an app you downloaded. Find out what app this is and uninstall it.
  • Check if you are able to access the recovery mode. From here I suggest that you do a factory reset. Take note that this will erase your phone data.

If the above steps fails to fix the problem then you should try cleaning the charging port of the phone using a can of compressed air. Make sure that the port is free from dust and debris. Charge the phone for at least 20 minutes using a different charging cord and wall charger then repeat the steps listed above.

In case the issue still persists then you should have the phone checked at a service center.

S8+ Not Charging After Battery Replacement

Problem: So here is the problem with my S8 Plus. I recently took it apart to fix my charging port and replace the battery. After that, the phone does not charge properly. It had 32% on it and when i plugged the charger in it didn’t not move from 32%. It barely charges when its off. What do you think is wrong and what can I do im very scared that I might have done something wrong when fixing it but I followed everything correctly

Solution: There are several factors right now that can cause this problem. The replacement battery could be faulty. The charging port of the phone might not be connected properly. There is also the possibility that the charger you are using is not working properly. To fix this try cleaning the charging port of the phone using a can of compressed air then charge the phone using a different charging cord and wall charger. If the problem persists then you should have the phone checked at a service center.

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