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Galaxy S7 edge restarts on its own, won’t stay on, stuck in Odin screen, other issues

Hi guys! Welcome to yet another article about the #GalaxyS7 and #GalaxyS7 edge. This one covers three boot- and/or power-related problems about this device.

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 restarts on its own, won’t stay on

Hello there. I hope you’ll return to me as fast as you can, Let me clarify the problem.

I use Galaxy S7 Edge. I was on a flight so my phone was turned off for quite some time and when I turned it on, it starts to heat up and restart over and over again, like every minute or less or whenever I tried to use it. I wasn’t that alarmed at first as I have experienced the same situation a couple of times before, So when I get to my hotel, I switched it off and  put it on charger. But when I tried to turn it on after fully charging it, instead of going back to normal like before, it stays the same, if not worse.

I am currently admitted in a hospital, alone, in a foreign country I’ve never been in before. I am so frustrated that I can’t even speak to my family or friends as my connections were all via Whatsapp, Viber , Imo etc…which were in my phone. I am currently using my laptop with a life span of 10-20 minutes or less. I can’t even charge my laptop since I didn’t bring an adapter that fits the sockets here. Please please please I’d really appreciate it if you could help me as soon as possible. Thank you.

P.S. I did try to put in in safe mode as you described but it didn’t work. Now it’s restarting like every 10 seconds or so. — Beza

Solution: Hi Beza. Firstly, we don’t intend to make our answers be used for emergencies so hopefully this post reaches you in time. Thedroidguy receives hundreds of requests for assistance everyday so we may not be able to publish posts that includes time-sensitive cases like yours.

Secondly, a problem like yours needs time in order to isolate the root cause. A randomly restarting phone can be the result of a number of possible reasons, each of which needs to be checked. Telling us the symptom only helps us to identify the real problem so much. We need more than the symptom to pinpoint where the problem lies. We understand that our method of correspondence is a one-way street so we don’t have the luxury of asking you back other pertinent questions and the full history of the device.

Since you mentioned that your phone had been acting up previously, though it managed to boot back up normally, there’s a big chance you may have a bad hardware. We’re thinking of a possible malfunctioning battery here, which, unfortunately, may require you to send the phone to a shop for repair. Normally, if the problem is caused by a failing battery, the phone won’t be able to stay powered on for a few minutes. To see if that’s the case, we suggest that you try to restart it to other modes — Recovery Mode or Download/Odin Mode.

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.

Any of these modes runs on a code separate from Android operating system so if the issue is on the software side (Android glitch), the phone should remain on. However, if your device continues to reboot on its own, or won’t boot successfully to any of these modes at all, that’s a clear sign that you have a possible hardware issue. As mentioned, it can be a battery issue, or any other bad component in the motherboard. A malfunctioning power management IC often shows similar symptoms so if that’s the cause, you’ll most likely end up with an expensive motherboard replacement, or an entire phone replacement.

If your phone becomes stable when booted to Recovery Mode but returns to the same problematic state after booting it again to normal mode, consider wiping the phone with factory reset. The problem is most likely caused by an unknown operating system glitch, or a poorly coded app. Wiping the phone clean and returning all software settings to their defaults should fix the problem.

Problem 2: Galaxy S7 edge battery stopped working, overheating, slow performance, won’t turn on due to bad battery

Hi. I have this Samsung Galaxy S7 edge. It seemed to work fine until a couple of weeks before when it suddenly froze and heat up like hell and restarts with all the LEDs on. After the restart it seemed to work fine until a day or less later, it does this again. Sometimes, it froze after heating up like hell so i perform soft reboot and then it seemed to work fine. Today it did that again and after soft rebooting, it heated up and turned off and since then it’s been a cold brick — doesn’t charge up, doesn’t do anything, no response upon plugging it in to a charger or pressing buttons. It’s just dead. Help. — Ahmadgujjar176

Solution: Hi Ahmadgujjar176. All the symptoms that showed prior to the phone ending up totally dead are consistent with a hardware malfunction, most probably a dead battery. One of the signs that there’s an on-going battery trouble is overheating even when the phone is in normal state. Together with the rest of the symptoms like slow performance and failure to boot up, there’s a big chance that the phone’s battery may have succumbed to a premature death. Unfortunately, this means that a professional will have to open the phone up and replace this part. Sure you can also do it yourself but keep in mind that the job requires basic electronics knowledge and some tools. If you want to replace the battery yourself, try to search Google for some guides that will allow you to do so.

Problem 3: Galaxy S7 won’t load to normal mode, stuck in Odin screen

So i have my Galaxy S7. A few months ago it was working just fine. i was able to get all my pictures and stuff off of it and what not. It sat in my nightstand for a few months after that so the battery did completely die. After i plugged it in for a while and got it to charge again, i keep getting stuck at this screen that says Galaxy S7 custom screen. it has a lock which is in the unlocked position and it is a black and white screen.

i have never rooted a phone or changed any major files so i’m not sure how it could work. And then when the battery completely dies i get this screen.

I have tried to boot into Recovery mode and clear cache and factory data reset. however the data reset don’t really finish. It’ll act like it for about 30 seconds then go right back to that Galaxy S7 custom screen. thank you for any support that you can give me on getting this issue fixed. — Kevin

Solution: Hi Kevin. Looks like your phone has a corrupted bootloader, which is a separate code that runs independently of the operating system. In fact, it runs before Android operating system loads and it’s a necessary software process to ensure that Android won’t encounter any trouble when booting up. With your situation, the bootloader may be at fault. We don’t have the history of your device so we can’t tell you why this is happening. To fix the problem though, you can try to reflash the bootloader back to stock. Below are the  general steps on how to flash a bootloader of any Samsung Galaxy phone. The exact steps may be slightly different for your phone model so be sure to 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.

Don’t forget, flashing is a risky software modification. Not doing the right steps may complicate things and at worst, cause permanent software damage. Be sure you know what you’re doing before you proceed. If you’re not confident with your Android troubleshooting skills and knowledge, let a more experienced user or professional do the job for you.

Alternatively, you can let Samsung fix the issue. Just bring the device to their store and see if someone can help you flash the software.

 


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