Galaxy S6 stuck in bootloop after Nougat update, won’t charge, won’t turn on, other issues

Hello and welcome to our new #GalaxyS6 post for the day! This post covers some of the common problems for this device — bootloop, won’t turn on, and won’t charge. We hope that this post can become another good reference for Android community.

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.

Below are specific topics we’re bringing for you today:

Problem 1: Galaxy S6 water damage, battery damage, won’t turn on

My Galaxy S6 took a swim in a river the other day. It was off when I found it and I didn’t try to turn it on. I put it in a bag of rice, which now after doing research I will never do again, and left it for 25 hours or so. It wouldn’t turn on so I thought I could charge it. I plugged it in and it comes up with the charging screen. After leaving it for a few minutes the percentage hasn’t gone up from 0. I turned it on and it booted fine. The percentage then said 32%. After working on it for a few minutes it rebooted and keeps rebooting a few minutes after it finishes booting every time. I have left it charging and I am going to bath it in isopropyl alcohol tonight a couple times. Is this a battery issue? What is my best route at this point? — Mark

Solution: Hi Mark. For any water damage scenario like the one you’re in, the most that you can do is perform some basic rescue steps and hope that no further damage occurs. Basically, the steps that you can do are limited to taking the phone apart and drying components out. As it stands, it appears that the battery might be damaged so there’s no amount of drying or washing or anything that you can do to fix that. We suggest that you let a professional check your device (and let them dry it too) so you’ll know the true state of the hardware. If you’re lucky and only the battery is damaged (hopefully no corrosion has developed yet), a battery replacement may fix the issue quickly. Ideally, you’re supposed to remove the power source (battery) right away to prevent the battery and other components from being shorted. Not doing so must have caused the current problem. Leaving a battery in a wet motherboard is a death sentence for any electronic device. If other components have been shorted, or if the power IC was damaged, there may be a need to replace the entire motherboard if a shop can’t find a way to replace them individually.

Water damage constitutes user mishandling and automatically voids the warranty so bringing the device to Samsung service center will not be a free repair. We strongly recommend that you let Samsung check the device though. If that’s not possible, just bring it to an independent shop that handles wet electronics and repair.

Problem 2: Galaxy S6 won’t charge

Hi guys. Until this morning my Samsung was working perfectly. However, now it does not charge nor recognises the charger. It has zero % battery, when I plug it to the charger it shows the battery icon with a flash but it disappears after a few seconds, and no red light.  I have tried a few things but nothing changed: blowing the plug slot, changing plugs and connectors. Can you help me? Kind regards. — Portal

Solution: Hi Portal. Firstly, there’s nothing much that you can do in terms of troubleshooting if your phone won’t turn on. If your device’s battery has stopped working, or if there’s an unknown motherboard issue preventing the device from booting normally, the best that you can do is to send it in for repair.

Secondly, the problem may have something to do with a bad charging port. If you’ve already tried to use another known working charger and charging cable, there’s a chance that the main reason why the phone does not turn on is due to a malfunctioning charging port. This means that only a repair can help you now. There’s difference between a phone that appears to charge but won’t boot up and a phone that doesn’t charge at all. The former means that the device still shows some indications that it’s charging like the presence of a red LED light, and makes vibration when restarting. A phone that doesn’t charge at all is a dead end for an average user. Unless you have the right tools and expertise to perform hardware repair or parts replacement, we really don’t recommend repair by yourself.

If you think that you can handle DIY (do-it-yourself) repair, there are always videos in Youtube on what you need to do. The only problem with that is the fact that DIY repairs usually appears easier on videos than in the real world. And in a lot of cases, DIY repairs usually end up with more problems than solutions. But again, if you think you can manage hardware repair, consider using the internet how to do it. You can start by checking or replacing the charging port. If that’s not the problem, you can move to the battery by replacing it as well. Other things to check includes the power management IC and the motherboard in general.

Sometimes, devices that fail to boot up happen due to an issue with the operating system. To see if it’s an Android issue and not bad hardware, try to see if you can boot the phone to either Recovery Mode or Download Mode. Below are the steps on how you can do that:

Boot in Recovery mode:

  1. Charge the phone for at least 30 minutes.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy logo shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  4. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  5. You can either wipe the cache partition or do a factory reset when in this mode.

Boot in Download Mode:

  1. Charge the phone for at least 30 minutes.
  2. Press and then hold the Home and Volume DOWN keys, then press and hold the Power key.
  3. When the Samsung Galaxy logo shows on the screen, release the Power key but continue holding the Home and Volume DOWN keys.
  4. Wait until the Download screen appears.
  5. If you can boot the phone in download mode but not in other modes, that means that your only way out may be to flash a stock or custom firmware.

If your phone remains dead and won’t respond to any of the hardware button combinations, have it repaired or replaced.

Problem 3: Galaxy S6 stuck in bootloop after Nougat update

Installed Nougat 7…phone restarts….and continues to restart. – tried the clearing cache and restarting using the volume down and power buttons – at the point I need to reset phone but want to backup what I can…is this possible? — Luke

Solution: Hi Luke. If you’ve already tried the steps below and the issue continues, you’re out of luck:

  1. Turn off your Samsung Galaxy device.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S6 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  4. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  5. Using the Volume Down key, navigate through the options and highlight ‘wipe cache partition.’
  6. Once highlighted, you may press the Power key to select it.
  7. Now highlight the option ‘Yes’ using the Volume Down key and press the Power button to select it.
  8. Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  9. The phone will now reboot longer than usual.

If your phone continues to restart even after wiping the cache partition, the next logical step is factory reset, which of course means wiping the entire storage device. You’ll only be able back your stuff up when the phone boots to normal mode or safe mode. If you haven’t tried to restart to safe mode, make sure that you do. Here are the steps:

  1. Turn your Galaxy S6 off.
  2. Press and hold the Power button.
  3. Once the ‘Samsung Galaxy S6’ logo appears, release the Power key and immediately press and hold the Volume Down button.
  4. Continue holding the button until the phone finishes rebooting.
  5. Once you see the text “Safe mode” at the bottom left corner of the screen, release the Volume Down button.

If your phone continues to restart on its own after attempting safe mode or factory reset, you should try to reflash the bootloader to stock. This procedure usually fixes bootloop issue after an update. Below are the general steps on how to do it. Keep in mind that the exact steps for your phone model may vary so be sure to do some extra research on how to do it properly. You also need to download the correct firmware.

Here are the general steps on how to flash a bootloader in a Samsung device:

  1. Look for the correct firmware for your phone model and download it. Make sure that you select the right one. It should be the same exact firmware that ran previously on your device. We assume that you list down the firmware version somewhere. If you did not take note of it before, there’s a chance that you may pick the wrong one. As you may know now, using an incorrect firmware can cause complications so good luck with that.
  2. Let’s now say that you have identified the correct firmware. You then want to download it to your computer. The firmware file should have a bunch of files in it like AP_, BL_, CSC_, etc.
  3. Look for the file that starts with a label BL; this should be the corresponding bootloader file for this firmware. Once you’ve identified the bootloader file, copy it to your computer’s desktop or to any other folder that you can easily access.
  4. Proceed with the rest of the flashing procedure using the Odin program.
  5. In Odin, click on the BL tab and make sure to use the bootloader file you’ve identified earlier.
  6. Now, make sure that the “Device Added” status and its “ID:COM box” has turned blue before hitting the START button. This will initiate the flashing of your phone’s bootloader.
  7. Restart the phone once the procedure is finished.


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