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Galaxy S7 fast charging not working, stuck in bootloop after failed rooting, other issues

Welcome to another #GalaxyS7 troubleshooting page. Today we help some Android users fix issues with their S7. Some of these issues have already been discussed in detail in some of our articles before so we will try to be as brief but informative as possible.

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 S7 edge stuck in bootloop after failed rooting, won’t turn off

Hey. I tried to root my Samsung Galaxy S7 Edge phone. looks like I messed it up. Odin took 7 seconds, and said “Pass!”, and the phone rebooted a few times. But now, it’s on the “Samsung” screen, and it stays there pulsing with a blue LED. Using various button combinations I can reboot the phone no problem, but it always stays on the Samsung screen. It’s quite hot to touch. Almost all of your tutorials start with “turn off your phone”, but annoyingly don’t say HOW to do that! There does not seem to be an off button, or combinations that simply turn the device off. I’ve tried the instructions in each of the articles on https://thedroidguy.com/2016/10/fix-samsung-galaxy-s7-cant-boot-successfully-stuck-logo-system-issues-1066215#galaxy-s7-stuck-on-samsung-logo-during-bootup, but none of them are effective (perhaps because, I cannot start from the phone-off situation? Any help would be appreciated! Thanks. — Garion

Solution: Hi Garion. These are ways to turn off your device:

  1. One is by pressing and holding the Power button and selecting Power off from the menu.
  2. Pressing and holding the Power and Volume Down buttons until the Maintenance Boot Mode screen appears (approx. 10 seconds). This is known as soft reset.
  3. Waiting for the phone drain all battery power.

If the first two options won’t work at all, we’re sure the third one will.

Once you’ve turned the phone off, be sure to let it charge for at least 2 hours before attempting to turn it back on. This will allow the battery to fully charge before you try the next steps.

Reflash the bootloader

Once you’ve charged the phone, the only other troubleshooting step that you can try is to reflash the bootloader. If this won’t work at all, you’re out of luck. Something must have damaged the software permanently so you should consider replacing the phone.

For reference, here are the steps on how to reflash a bootloader. The exact steps may be slightly different for your particular model so we suggest that you consult other guides.

  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.

Problem 2: Galaxy S7 edge won’t turn on, stuck in Samsung logo screen

Samsung S7 Edge won’t bootup and stuck on Samsung logo then a black screen and a blue LED are shown, then wait until the battery drains out and shut down totally. This issue faced after the last few updates in this year…while before the phone was working well. After the updates the phone works fine..but once restarted or turned off it never boots up again. The phone never had hits or faulings on the ground; it’s almost new. I tried all the trouble shooting guides as this site suggested…the safe mode, the soft reset, the data wiping, the hard reset..but no success. Please your support is appreciated. Regards. — WRamahi

Solution: Hi WRamahi. If your phone won’t turn on normally at this time, the only other troubleshooting step that you can try is to see if you can boot the device to other modes. If it remains dead, you should try to use another charging cable and charger to see if it’s a charger issue. If both steps won’t work, you must contact Samsung or any relevant party so the phone can be checked for hardware error or malfunction.

For reference, here are the steps on how to restart the phone to different modes:

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.
  6. Use Google to look for a guide on how to do it.

Boot in safe mode:

  1. Charge the phone for at least 30 minutes.
  2. Press and hold the Power button.
  3. Once the Samsung Galaxy 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.

The only difference of safe mode from normal mode is that the former prevents third party apps from running. If you can boot the phone in safe mode but not in normal mode, uninstall all apps until the issue (that prevents you from booting normally) is eliminated.

Problem 3: Galaxy S7 edge fails to boot up normally

I BOUGHT THE SM-G935A (SAMSUNG GALAXY S7 EDGE) IN 2016, AND IT WILL NOT TURN FOR A DAY OR TWO, THEN HE TURNS ITSELF ON. AS OF TODAY, I AM NOT ABLE TO TURN MY PHONE ON, BECAUSE IT TURNED ITSELF OFF AND WILL NOT COME BACK ON FOR THE PAST 12 HOURS OR MORE. RIGHT BEFORE IT USUALLY DIE, I SEE A LINE WITH DIFFERENT COLOR LIGHT BEFORE IT DIES. I CALLED AT& T AND THEY SAID THEY CAN SELL ME ANOTHER PHONE FOR $799 WITH THE SECOND ONE FREE AFTER I BOUGHT THIS PHONE FOR OVER $700 LAST YEAR. — Uhurijess

Solution: Hi Uhurijess. If your phone still rings when you call it, makes sound notifications when receiving messages, or still shows LED light when being charged, that means that there may be a problem with the screen only. That may explain why you say a colored line before the screen failed completely. To fix this problem, you must send the phone in to be fixed.

If the phone does not show any sign that it still turns on at all, try to check if using another charger and charging cable will allow it to charge. Just like what we tell WRamahi above, you must have it repaired or replaced if charging with another charger won’t power it back on.

Problem 4: Galaxy S7 fast charging not working

I bought a Samsung Galaxy S7 and the original charger that came within the package took hours to charge my phone. But after four weeks with this issue, the charger gave up and stopped working. I had to resort to buying other Samsung chargers but none was compatible with my phone. The ones I have tried takes longer to even get to charge or they simply don’t work in the phone. It’s seems like a problem that I can’t fix and it’s a frustrating to have my phone constantly connected to a wall. I am searching for a solution to this problem that I have been receiving for months. — Brandeis Woodstock

Solution: Hi Brandeis. If your S7 runs Android Nougat,  make sure that you allow fast charging to work. Even if you’re using a fast charger, you still need to enable fast charging feature in your phone in order enjoy faster topping up of the battery.

To enable fast charging in your S7, follow these steps:

  1. Open Settings app.
  2. Tap Device maintenance.
  3. Tap Battery.
  4. Tap More icon (three-dot icon) at the upper right hand side.
  5. Tap Advanced settings.
  6. Move slider for Fast cable charging to the right.

Keep in mind that fast cable charging will only work with a working fast charging cable from Samsung. Be sure to buy one that’s designed for the Galaxy S6, S7 or S8. Using a charger meant for other Samsung phone models may not allow fast charging to work. Do not use third party fast chargers as they may not be validated with Samsung’s system.

Alternatively, you can also try to use fast wireless charging feature. We know that the S7 comes with both a fast cable charger and wireless charger so you can use the latter if the former is malfunctioning.

 


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