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What to do if Galaxy S7 edge screen stays black and won’t turn on, other issues

Hello and welcome to the latest #GalaxyS7 troubleshooting post. Today, we answer some questions on what an S7 owner can do if the screen suddenly decides to stop working properly. We hope you’ll find this useful.

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 screen showing purple discoloration

So i fell asleep woke and woke up pulled my phone out of the couch (was not anywhere that my lyng on it would have been an issue). it te had these purple coloured lines lots of them taking up roughly 70-80 percent of the screen. Shortly after it went black but my phone still rings and is running. i cannot see or touch the screen. has the blue flashing light by the earpiece. I HAVE READ THROUGH YOUR OTHER RESPONSES ONLINE. PLEASE CONSIDER THAT I CANNOT KEEP MY PHONE TO STAY TURNED OFF AFTER I FORCE REBOOT IT. The screen had came back on once but only for a short period before returning black. Still had purple lines. Still lots of them and the touch was still mostly unresponsive. PLEASE HELP ME. I thank you guys either way for everything on your site. i have been using it a lot since found it. this is my first questionnaire.

ALSO HAS BEEN FULL OF MEMORY FROM DOWNLOADED APPS AND ACTING FUNNY PRIOR TO THIS. — Brandon.Mulrooney

Solution: Hi Brandon. In 99% of the time, screen discoloration like the one you’re experiencing is the result of hardware malfunction. We don’t know the full history of your S7 but we think your phone’s screen assembly has been physically impacted. In what way, only you can tell.

To check if our suspicion is correct, try to load the phone to alternate modes — Recovery Mode and Odin Mode — and see what happens. These two modes run different codes from Android so your screen should work normally if the reason for the problem is software (Android) related.

To boot to these two modes, follow the steps below:

Boot in Recovery mode:

  1. Turn off the phone. This is important as you can’t load Recovery Mode when the phone is on. If you can’t turn it off normally, wait until the battery drains.
  2. Charge the phone for at least 30 minutes.
  3. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  4. When the Samsung Galaxy logo shows on the screen (or not), release the Power key but continue holding the Home and Volume Up keys.
  5. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  6. You can either wipe the cache partition or do a factory reset when in this mode.

Boot in Download Mode:

  1. Turn off the phone. This is important as you can’t load Recovery Mode when the phone is on. If you can’t turn it off normally, wait until the battery drains.
  2. Charge the phone for at least 30 minutes.
  3. Press and then hold the Home and Volume Down keys, then press and hold the Power key.
  4. When the Samsung Galaxy logo shows on the screen, release the Power key but continue holding the Home and Volume DOWN keys.
  5. Wait until the Download screen appears.
  6. If you can boot the phone in download mode and the screen works (which means the purple discoloration is gone), that means that your only way out may be to flash a stock or custom firmware.
  7. Use Google to look for a guide on how to do it.

Remember, the two procedures above are provided to help you confirm if what we think is true. If you can’t either of them for whatever reason, or if the screen remains problematic in either mode, that means you have a hardware malfunction. You must let a professional check the device so the screen can be repaired.

Problem 2: What to do if Galaxy S7 edge screen stays black and won’t turn on

I am using a Samsung Galaxy S7 edge. Last week, the SIM is not readable, then 2 days back the phone is not turning on. The phone is not broken or dropped. I have handled it with very delicate care but still all these things happen. I have tried to reboot it by pressing the home key but nothing happen. Need Help and guidance regarding this issue. Thanks in advance. — Gaurav

Solution: Hi Gaurav. There are types of possible causes behind your trouble —  software-related and hardware malfunction. We are here to provide solutions for software causes only. If our suggestions won’t help you fix your problem, that means that it’s the result of bad hardware. It can be a failing battery, a damaged power management IC, or an unknown motherboard issue. To get proper diagnosis, you must let a professional examine the phone.

Now, to see if your issue is the result of a software glitch or bug, here are the steps that you can try:

Verify if adapter, charging cable, or charging port are working

The reason why the phone is not turning on may be lack of power because it’s not charging normally. To ensure that your power accessories are working, we recommend that you use another set of known working adapter and charging cable. Make sure that you charge the phone using the new cable and adapter for at least 30 minutes.

If possible, do an ocular inspection of the charging port to see if there’s dirt or bent pin inside. You can do this with the help of some form of magnification, like the one technicians use. If you think there’s a foreign object inside the charging port that may be blocking the charging cable, use a can of compressed air to blow it away. Avoid sticking something inside as you may accidentally bend one of the pins.

Perform a soft reset

Your phone may actually be powered on though it may be stuck or unresponsive. To see if that’s the case, try to simulate a “battery pull” by following these steps:

  1. Charge the phone for at least 30 minutes.
  2. Press and hold the Power and Volume Down buttons until the Maintenance Boot Mode screen appears (approx. 10 seconds).
  3. From the Maintenance Boot Mode screen, select Power down. You can use the volume buttons to cycle through the available options and the Home button (located below the display) to select.

Restart to safe mode

Sometimes, third party apps can interfere with the operating system causing all sorts of problems. In other cases, bad or malicious third party apps can freeze the system and prevent Android from loading. To see if that’s the case, try restarting the phone to 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.

Remember, safe mode blocks third party apps and services but won’t actually pinpoint the problematic app. If your phone turns back on in safe mode but normal mode remains problematic, that means a third party app is to blame.

Perform a factory reset

If you can manage to turn the phone back on, make sure that you perform a master reset. This procedure will return all software settings back to their defaults. If the main reason for the problem is due to a software glitch, factory or master reset should eliminate it.

To master reset your device, 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.

Problem 3: Galaxy S7 video playback problems after installing Nougat update

Hey Guys. Some help please. I have recently updated to Nougat in my Samsung S7 in UK on EE. And since then I have had problems with video playback. Youtube, youtube kids, bt sports app, sky sports, all seem to push randomly when playing, maybe every 5 to 10 mins. Apps like showbox play continuously but have a stutter while playing, and the screen quickly goes from light to dark. I have cleared cache after putting my phone into recovery mode. But this has not helped. Could you help me please? Thanks. — Squiral

Solution: Hi Squiral. There are only three effective solutions for the issue you’re experiencing here:

  • Cache partition wipe
  • Factory reset
  • Installation of app updates

If the problem remains after doing all three, there must be a firmware coding problem that affects these apps. You can report the issue to your carrier so they can create a ticket for it. Your case is the first of such report for us so we can’t really tell if it’s widespread issue, or if it’s an isolated one.

 


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