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Galaxy S7 edge overheating and stuck in Samsung logo screen, black screen issue

Hello and welcome to another #GalaxyS7 troubleshooting article. Today’s S7 post addresses three similar and/or related issues: overheating, No Boot (stuck in Samsung logo scree), and black screen problem. We hope that you’ll find our suggestions 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 S7 edge screen went black after accidental drop, white thin line showing

Yesterday around 10 AM I dropped my Samsung Galaxy S7 Edge and when it fell it hit the screen just right (or wrong) so that there was a white thin line that went from the left side all the way to the right side. Other than this small white line, the phone was fully functional, even in sleep mode. Around 5 PM the same day my phone screen went black as if it had entered sleep mode and I was not able to wake it, so my screen was completely black. I tried to restart the phone and also attempted to do a reset by holding the home and volume button, however both were unsuccessful the numerous times I tried.  I could tell when the phone would power on because the notification sounds would still function, but the screen would remain black. Around 11 PM my screen suddenly restored and was almost fully functional again, except for the small white line was back, and under the white line the screen would move back and forth independently, however all areas of the screen are still functional and able to be used.  I have changed all my settings to not allow my phone to go into a sleep mode but to always have a screen saver showing, and so far the screen has not returned to a blackout mode.  Is there an easy fix to this issue other than filing an insurance claim and having to pay the 200.00 deductible? — Lindsey.Miller.slp

Solution: Hi Lindsey. In your particular case, it does appear that there’s an on-going hardware malfunction. Any screen discoloration and sudden appearance of vertical or horizontal lines, especially with similar circumstances surrounding your device, are certain indicators of a bad screen assembly. The drop may have damaged the LCD or the flex cable in the screen assembly, causing the symptoms you now see. If said symptoms were not there before the accidental drop, then you should seriously consider sending the phone in so the screen can be replaced.

Though you’ve done a good job of preventing your phone from going to sleep, it’s not a permanent fix at all. There’s no software tweak that you can do to repair a broken hardware at all. The most that you can do is to remedy the situation. You’ll soon realize that preventing the phone from going to sleep mode can tax the battery, causing it to have a significantly short lifespan. While that’s an entirely different issue waiting to happen, it can seriously hamper the performance of your device in the long run. The best thing that you can do is to tackle the issue head on by fixing the bad screen first.

If you have an insurance for your phone, we recommend that you use it to get a discount for the repair cost. And, if possible, be sure to let Samsung do the repair instead of third party shops.

Problem 2: Galaxy S7 edge overheating and stuck in Samsung logo screen

Hi. So my Samsung S7 edge stopped working about 6 months ago, one night it was incredibly hot so I decided to restart my phone as a way of troubleshooting the issues. The phone had a recent update a few days before and was already starting to play up but after restarting my phone it has been stuck on the Samsung logo and the phone gets unbelievably hot. I have tried all the system reset options you have listed for this problem but to no avail. Is there potentially something I can do or is it a hardware issue that only a service centre can fix? — Ethan Mann

Solution: Hi Ethan. The general rule in Android troubleshooting is to exhaust all available software solutions first, including a factory reset. If nothing changes after doing them, then that’s the time that you decide to send it in. In your case the possible software solutions that you must attempt first should include the following:

  • cache partition wipe
  • app and Android update installation (whatever is available)
  • restarting the device to safe mode
  • factory reset
  • bootloader/firmware flashing

Install app and Android updates

We assume that you’ve already updated everything that can be updated in your phone but in case you haven’t, make sure to double check. Poorly coded apps can sometimes mess up the system after a major operating system (Android) update. The best way to minimize bugs is to run an updated software all the time.

By default, Google Play Store app is set to automatically download and install app updates. If you previously changed this setting, make sure to revisit the app and set it to install updates automatically. Here’s how:

  1. Open Play Store app.
  2. Tap More menu (three-line icon at the upper left).
  3. Tap Settings.
  4. Tap Auto-update apps.
  5. Select Auto-update apps over wifi only.

Clear your phone’s cache partition

This solution precedes master/factory reset. If you’ve already tried a factory reset before contacting us, you can simply skip wiping the cache partition. If you haven’t tried it yet though, here’s how it’s done:

  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.

Cache partition wipe won’t affect user data like your photos, videos, music, etc. so it can be done without fear of losing them.

Observe your phone in safe mode

Sometimes, third party apps may remain problematic even if they’re running their latest version. If you don’t screen what app to install thoroughly, it’s only a matter of time before you experience problems with them. It’s not easy to ascertain though if your problem is being caused by an app or not. The only other way to know that is by restarting your S7 to diagnostics mode called Safe Mode. While in this mode, all third party apps can’t run. This means that if the problem won’t occur and the phone works as expected, then a third party must be to blame.

In order to boot your phone to safe mode, follow these steps:

  1. Turn your Galaxy S7 off.
  2. Press and hold the Power button.
  3. Once the ‘Samsung Galaxy S7’ 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.

Wipe the phone by doing a factory reset

Factory reset is a drastic solution that can fix a lot of software problems. If there’s a software glitch that causes your phone to behave like it does now, factory reset will most likely restore it back to its normal working order.

To factory reset your S7, 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 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/firmware

Finally, if nothing will change at all after doing the solutions above, you should consider restoring your phone’s bootloader (Recovery) and firmware back to their known working state. This is an especially effective solution for those devices that were rooted or running custom firmware.

Flashing is basically tampering with your phone’s software. If you’re not careful in doing it, a single misstep can brick your phone and cause more issues. Be sure to consult other guides before you do it. Below are the general steps on how to flash a bootloader. Flashing the firmware should be similar. Again, be sure to consult other guides to prevent messing up your phone’s software. Our steps below are only for demonstration purposes only. Do them at your own risk.

  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.

Contact Samsung for repair or replacement

If all our suggestions above won’t help at all, the most likely reason is bad hardware. Send the phone in to fix it.

 


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