How to fix Galaxy S8 update issue: won’t turn back on after installing an update

Hello Android fans! Today’s troubleshooting article answer some issues for the #GalaxyS8. We have been getting update-related problems for this device recently so we include some of the cases here. We hope you’ll find the post helpful.

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. 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 S8 Plus goes into boot loop after an update

Hello. I’m with a problem in a S8+ (955U1). Since its with the last update firm-XAA version and theres a bootlooping problem, crashing apps.. I’ve tried everything on hard reset and flash all over with sammobile stock roms.. but the problem persists.. the same issue appears no matter firmware carrier I flash. I’ve tried XAA, XAS and ATT last firms.. I’m in Brazil and there’s no warranty here..Please Help me #fail to open recovery_cause(No such file or directory)# #Reboot Recovery Cause is [UNKNOWN]# Support SINGLE-SKU 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: Flashing different stock ROMs from other carriers will naturally cause boot loops. There’s a reason why carrier firmware are labeled differently. You should only try to flash stock firmware designed for your particular phone model. Using a different one, like flashing an AT&T version to a T-Mobile device can lead to problems, one of them being boot loop. If you’ve already tried to flash the stock ROM that originally came with the device and that did not work, you’re out of luck. The reason for the boot loop probably goes beyond incompatible firmware. Its partitions may had been corrupted, or there may be a hardware malfunction. Try to bring your device to an independent service center if there’s no nearby Samsung store.

Problem #2: Galaxy S8 No network available error after charging port replacement

I have a Samsung Galaxy S8 that I had taken to Gearvana phone repairs in Adrian, Michigan and they did a charger port replacement on Sept. 8, 2018.  After I got the phone back it didn’t work. It had a “no network available” error when I tried to use it. I took it back to them and they had no clue.  So I took it to Sprint my carrier in Adrian, Michigan and they said the SIM card seems okay and that I should take it back to Gearvana to have them replace the antennas, which they did.  The phone still does not work. I took it to the Sprint repair in Jackson, Michigan and they said it is probably the board and not worth fixing to see what Gearvana would do about it because they probably broke the phone. I took it back to Gearvana and they said the Samsung Galaxy S8 is noted for the “no Network Available” error.  The phone has been looked at several times and no one seems to be able to fix it. I am retired and on a fixed income and cannot afford to put any more money into the phone. It already cost me $100.00 to have the charger port replaced and now the phone doesn’t work at all. I have a lot of health issues and my doctor’s call me on this cell phone.  Please help? Thank you.

Solution: While letting third party shops do the repair can be cheaper compared to Samsung repair, there’s sometimes no guarantee that everything will work out fine afterwards. What happened to you is unfortunate but the only hope you have right now is to force the issue with the shop that did the initial repair. If you are positive that your phone’s network functions were working prior to the charging port replacement, then the technician who performed the procedure must have messed up with the hardware.

No network available error can be a sign of a SIM card issue, software glitch, or hardware malfunction. If you’ve already tried wiping the phone thru factory reset before contacting us, then the most likely reason is bad hardware. The technician may have damaged the antenna or another chip during the repair. Issues of this kind may only be fixed by replacing the damaged part, or by installing a new logic board altogeher. Getting a new motherboard is impractical as it can cost more than half the price of a brand new device. Your only hope now is to convince the repair shop to take your phone in again and repair it for free.

Problem #3: Galaxy S8 freezing and restarting on its own after installing an update

Hi. so i recently updated my S8 and within the next hour it started to freeze and restart on its own..the interval kept on decreasing and now it freezes every few seconds if i do any multi-tasking or open multiple tabs. Now i tried all the basic solutions (didn’t work)..took it to samsung service center and the guy said “your motherboard is done.” (Also: He didn’t open the set…just did some updates with Odin didnt work and so he came back saying it’s a motherboard issue)

Question: should i take his word or do you suggest there is any alternatives i try before making any further move?? And just so you know…i can access every thing in the set but freezes if overloaded with tasks. Hoping to hear from you!

Solution: If the Samsung representative you talked to was a qualified technician (and not a sales agent), then you should probably take his word. After all, he did try to physically check the device and run some tests to check the software.

If you want to see if the problem is fixable on your level, you can attempt to downgrade Android to its previous known working version. You can do that thru Odin. By flashing the previously working Android, there’s a chance that the hardware may be relieved of the pressure from the new OS. While Galaxy S8 can work with the latest available version of Android (Android 8) as of this writing, there may be a peculiar bug that causes it to get overwhelmed when running multiple tasks. We haven’t heard of this issue happening in other S8 devices so we want to say this may be an isolated case.

If you want to give flashing a try, use Google to find a good guide for the steps. Keep in mind that flashing is risky and can permanently damage the software environment of your device. Do it at your own risk.

Problem #4: How to fix a Galaxy S8 that stopped turning back on after installing an update

My S8 was working fine however starting a few weeks ago it would turn off suddenly at random times with plenty of charge. Normally I would be a able to turn it straight back on or if that didn’t work plug it in to a charger then turn it on. For the past couple of days straight after I updated it my phone hasn’t been able to turn on at all and when I plug it in to charge it, it shows it is charging but just doesn’t turn on.(I’m guessing it’s at the latest android version as I just updated it this week).

Solution: If your S8 no longer turns on right now, you should treat the issue as such and follow solutions for it. No Power or Won’t-Turn-on issue can be caused by a software glitch or hardware-related problem. In some cases, the cause is obviously a hardware glitch so no software troubleshooting is necessary.

In your case, since the device was still working properly before it stopped turning on for good, there’s a chance that the cause may be software in nature. To see if that’s the case, make sure to do these troubleshooting steps:

Use another set of charging accessories

Like the main device itself, charging cables or adapters can go bad sometimes. If possible, try charging your phone using another set of official Samsung USB cable and adapter. Be sure to leave the phone charged for at least 30 minutes before turning it back on.

Try wireless charging

The Galaxy S8 can charge wirelessly. To bypass any possible issue with the charging port, using a wireless charging is a good idea. If you don’t have a wireless charger, try to bring the device to a Samsung store so you can borrow one from there and use it to charge your S8. If your phone will turn on, that means there may be an issue with its charging port. To fix it, you must send the phone in for repair.

Check for possible screen issue

Sometimes, a bad screen issue can be mistaken for No Power issue. The latter is indicated by total loss of power and no sign of life — no sound, no LED light, no vibration. If your phone’s screen remains black but otherwise alive and making a sound, showing LED light, and/or vibrating, the most likely issue is a bad screen assembly. In this case, you want to have the device repaired.

Boot to alternate software modes

Sometimes, Android may encounter a bug it can’t recover from causing boot problems. This means that while the phone may appear dead, it’s simply unable to boot up normally. At times, such a situation can be fixed by booting the device to Recovery Mode so a cache partition wipe or master reset can be performed. To check:

  1. Turn off the device. This is important. If you can’t turn it off, you’ll never be able to boot to Recovery Mode. If you are not able to shut the device off regularly via the Power button, wait until the phone’s battery is drained. Then, charge the phone for 30 minutes before booting to Recovery Mode.
  2. Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
  3. 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).

If you are able to turn the phone on to Recovery Mode, there’s high chance that the problem can be fixed on your level. If the phone remains off though, consider repair or replacement  by calling Samsung.


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