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What to do if Galaxy S7 edge gets stuck in Samsung logo screen, black screen issue

Updates are sometimes sources of frustration. In some cases, users may be to blame while in most other situations, poor coding is the root cause. Since a lot of Android users often found themselves facing with all sorts of annoying update problems, we’ve decided to answer two particular questions here that may help enlighten those experiencing similar issues.

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: What to do if Galaxy S7 edge gets stuck in Samsung logo screen

Hey. I have updated my Galaxy S7 edge dual sim, and after finishing updating it won’t start on. It gets stuck when it get to Samsung sign. I tried to do safe mode, but I can’t get there. As soon I press the power button It get stock at the Samsung logo. I have tried all possible way to fix, I turn the phone off for like 30 seconds and I tried to safe mode by pressing power and key down and also I tried to press power and key up, I to won’t do any thing, still stock at the Samsung logo. Please I need help. Thank you. — Nash

Solution: Hi Nash. Updates can sometimes get messy due to a lot of reasons. We noticed though that an issue like yours occur following a failed rooting or flashing procedure. If you never tried to do that sort and the problem only occured after installing a carrier- or Samsung-provided update, you should be able to fix the problem by clearing the system cache and/or wiping the phone via factory reset. Below are the steps on how to do each of them.

Clear system cache

All temporary files including update APKs are stored in the cache partition. Sometimes, incorrect of update files are stored here for some reason, causing problems with the system cache. In turn, a bad system cache can lead to problems, one of which is the one you’re experiencing right now. To see if the cause of your problem is a bad system cache, follow these steps:

  1. Turn off your Samsung Galaxy S7.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 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.

Master/Factory reset

Factory reset is an indispensable tool in fixing all kinds of Android problems. It’s an especially important solution for your case since the problem is probably software-related. By doing a factory reset via Recovery mode, there’s no need for you to load Android operating system and go into Settings. Instead, you’ll need to do a combination of hardware buttons to do it. Below are the steps on how to master reset your phone:

  1. Turn off your Samsung Galaxy S7. It’s important that the phone is off before attempting the steps below. You can’t start Recovery Mode from a powered on device. If you can’t turn the phone on normally, wait until the battery drains so the device shuts down on its own. Then, charge the phone for at least 30 minutes before proceeding.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 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 data / factory reset.’
  6. Once highlighted, you may press the Power key to select it.
  7. Now highlight the option ‘Yes — delete all user data’ 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.

Flash the bootloader

If you happened to attempt a rooting or flashing procedure before the issue started, the situation is most probably related to that. As mentioned above, we’ve seen a lot of similar cases due to failed rooting or flashing attempts.  While it’s no longer a surprise to us, the result of failed rooting or flashing varies a lot and ranges from minor glitches to permanent software damage. Rooting or flashing have inherent risks to them so they’re not recommended to new or average users. These procedures require in-depth knowledge about Android and they can be risky if not done properly. It’s understood that only advanced users do them since they are the ones who knows how to fix issues that may arise. In cases where new or average users do them, problems often occur. If you did update your software via flashing, it’s possible that you may have used an incompatible firmware version, or that your phone may not be set properly before you attempted the procedure. In other cases, defective USB port in a computer causes errors during flashing, which may result to permanent damage to the storage device.

We don’t know exactly what happened to your device so the only suggestion for you at this time is to try to reflash the bootloader. It’s very similar to flashing a firmware so you should know how to do it. Below are the general steps on how to do it in a Samsung device. Exact steps may be slightly different for your particular phone model.

  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.

Should flashing the bootloader won’t fix your problem, find other forums with users who may have tried using the rooting software or flashing procedure that you initially attempted. They may be able to help you, especially if your phone shows an exact error message. Also, try to contact the developer of the rooting or flashing software you used to see if they can advise you on what to do.

Send the phone in

Otherwise, your device may have suffered a fatal software glitch which may have resulted to a permanent hardware issue, such as a corrupted storage device. In this situation, some or most sectors have become corrupted or unreadable, resulting to the device being unable to install an update or load Android properly. You must have the phone replaced in this case.

Problem 2: Galaxy S7 edge screen stays black after battery drain

Hello. My Samsung Galaxy S7 edge was turned off after its battery was drained. I charged it and then tried to start it. In first attempt its screen was not responding at all and it restarted again. Then when it rebooting its welcome screen was distorted and it restarted again by itself. At last its screen was totally black. But its two buttons (Back Button and Recent Button) are still showing lights. I tried restarting it again and again. I tried forced reboot also. But nothing helped. Its still the same. Also when I put it into charging again, its not showing the charging progress. — Vikash Gupta

Solution: Hi Vikash. If your phone’s battery was drained to 0% and died on its own, it’s not recommended to attempt to start it right after charging it. You must wait for at least 30 minutes before you attempt to power it back on again. This will allow the battery to store enough energy to power the device again.

If you’ve done that before contacting us, the next thing that you want to do is to check if the problem is being caused by bad accessories like charging cable, adapter, or case. If you have another Galaxy S7 or newer, try to use its charging cable and adapter to see if the current set of cable and adapter is defective. Also, if you’re using a case, try removing it before attempting to charge the device. Some cases may not allow the charging cable to connect properly with the charging port.

If you’ll manage to charge the phone as indicated by a vibration, LED light on top, or phone making sound notifications (after attempting to power it on) but the screen stays black, it’s possible that the issue may be isolated to the screen. To see if the screen issue is being caused by an Android operating system glitch, boot the phone to other modes — Odin Mode and Recovery Mode. These two modes run independent of Android so if your screen works in any of them but not when your phone loads Android, that means you’ll probably need to do a master reset to fix it.

To boot your phone to other modes, follow these steps:

Boot in Recovery mode:

  1. Turn off your Samsung Galaxy S7. It’s important that the phone is off before attempting the steps below. You can’t start Recovery Mode from a powered on device. If you can’t turn the phone on normally, wait until the battery drains so the device shuts down on its own. Then, charge the phone for at least 30 minutes before proceeding.
  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.

 


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