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Fix Samsung Galaxy S7 Edge screen that went blank / black while watching a video, other power issues

Black or blank screen (#blackscreen) issues are becoming more common with the #Samsung Galaxy S7 Edge (#S7Edge) as many of our readers contacted us regarding this problem. While we already published a lot of posts addressing this kind of issue, we are obliged to answer our readers who just contacted us. After all, one issue might be different from the other even though the symptoms are the same.

Galaxy-S7-Edge-black-screen-issues

In this post, the first problem I tackled is about a unit that reportedly went black while the user was watching a video. More often issues like this would cause the phone to become unresponsive and that’s what actually happened according to the report. What’s more confusing is that the device may still be powered up as the LED notifications is showing blue light flashing. Read on to understand more about this issue and learn how to fix it.

As to our readers who have other concerns with their devices, make sure you visit our S7 Edge troubleshooting page for we have already addressed a lot of issues with this phone since its release. Odds are that there are already existing solutions on our website. So, try to browse through the page to find similar problems. If you need further assistance, however, you can always contact us by completing our Android issues questionnaire.

Galaxy S7 Edge screen went black while user watches a video, blue light flashing

Problem: I was watching a film and a message came through and the screen went black and became unresponsive. I did the things that you said, there is a blue light flashing on the top right corner but other than that, nothing. Is this rebooting and how long will it take? I have only had the phone 1 month and I am not very technical.

Answer: If I may ask, what exactly were the things that we suggested that you did? I was actually hoping you’d tell us the procedures you already did so that we don’t have to repeat the same procedures. The thing about us technicians is that we would try to rule out one possibility after another and if we don’t know of the procedures our customers did, we sure would end up suggesting the same things. That said, I think the problem with your phone is that the firmware or the system crashed that left it unresponsive–it’s powered on but just won’t respond to anything even if you connect the charger.

System crashes are very common especially if the device’s firmware has recently been updated. But don’t worry, in your case, it seems like a minor problem and you can actually bring the device back to life by simply pressing and holding the Volume Down button and the Power key together for 15 seconds. However, there’s no guarantee the issue won’t happen again. So, continue observing your phone and if the same problem happens after a few days, your handset may be suffering from a firmware issue. If it started after an update, I suggest you try wiping the cache partition first:

  1. Turn off the phone.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy S7 Edge 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 wiping the cache partition. Once completed, highlight ‘Reboot system now’ and press the Power key.
  9. The phone will now reboot longer than usual.

If the problem remains after deleting the system cache, then you have you no other option but to reset your device but before you actually do that, make sure you backup your data, contacts, pictures, videos and other files.

  1. Turn off your Samsung Galaxy S7 Edge.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key. NOTE: It doesn’t matter how long you press and hold the Home and Volume Up keys, it won’t affect the phone but by the time you press and hold the Power key, that’s when the phone starts to respond.
  3. When the Samsung Galaxy S7 Edge 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. NOTE: The “Installing system update” message may show on the screen for several seconds before displaying the Android system recovery menu. This is just the first phase of the entire process.
  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.

I hope this helps.

Galaxy S7 Edge left to charge overnight, overheating in the morning

Problem: My phone was plugged in last night to charge. My alarm never went off so I checked my phone and it was super hot. I unplugged it, it is now 3 hours later and it is still very very hot. Has not cooled down a bit. I can’t turn it on and can’t hold it very long because it is too hot. Working fine before I went to bed.

Answer: My question is, have you disconnected the charger already? If not yet, then please do to avoid further complications.

My next question is were you using the original charger? If so, then the problem might be with the phone’s hardware specifically the battery. However, if you were using a third-party charger, then it must be the charger.

Now, assuming you’ve already disconnected the charger and that you were using the original one, your phone should have already cooled off. If not, then don’t do anything yet; don’t even attempt to turn it on. Wait for a few minutes to see if it cools down, if not, then bring it to a shop and let the technician handle it for you. Here’s why…

  • First, the moment you open it up the warranty will become void.
  • It takes several minutes to actually open it up because of the (super) adhesive the manufacturer used so that the phone could pass IP68 rating.
  • You may damage your phone more when you do.
  • There are always safety risks especially that the phone is heating up.

However, if the phone cooled down, then we can actually try to troubleshoot it and see if we can fix it. In this case, here’s what you need to do…

Step 1: Attempt to turn the phone on

There are two ways to do so; first, the typical turning on procedure wherein you just press and hold the Power key until the screen flickers; second, you can try to force restart it to rule out the possibility that the cause of the problem is a system crash.

Press and hold the Volume Down and Power keys together for 10 seconds. If it was just a system crash, the device would reboot.

Step 2: Try to boot it in safe mode

In case the device failed to boot up using the two procedures I cited above, then it’s time to rule out another possibility; that this problem was caused by a third-party app. For this, you need to boot your S7 Edge in safe mode to temporarily disable all third-party apps and services.

  1. Press and hold the Power key.
  2. As soon as you can see the ‘Samsung Galaxy S7 EDGE’ on the screen, release the Power key and immediately hold the Volume Down key.
  3. Continue holding the Volume Down button until the device finishes rebooting.
  4. You may release it when you can see ‘Safe mode’ in the bottom left corner of the screen.

Step 3: Boot the phone in Recovery Mode

This procedure is to verify if your device can still power up its components. When in recovery mode, Android’s interface won’t be loaded but all components will be powered up. If the problem is with the firmware, then the device can boot up successfully using this method, otherwise, you need a technician to check it for you.

  1. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  2. When the Samsung Galaxy S7 Edge shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  3. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.

In case the phone successfully booted up in recovery mode, then there’s a big chance you can fix it on your own and the first thing you need to do is wipe the cache partition and if that doesn’t fix the problem, then a master reset is necessary.

Step 4: Send the phone in for checkup and/or repair

Do this if the device won’t turn on after doing the first 3 steps. As far as troubleshooting is concerned, you’ve done your part already. Now, it’s time to seek support from a technician who can do further tests to determine what the problem is.

Galaxy S7 Edge screen takes up 40% of the battery

Problem: Hello, I got Galaxy S7 Edge but the screen display drains so much battery it takes 40%. My brightness is low. What should I do? Thanks.

Answer: You should only be worried if your device is actually draining its battery quicker than normal. If the battery drain is normal, then you don’t have to worry about anything that’s running in your phone or about services that use up the battery. But let me briefly explain why you’re seeing the screen taking up 40% of the battery…

There aren’t any other services or apps that use up the battery more than the screen that’s why the display is at the top of services that uses the battery more. In reality, the screen is one of the components that need more power. So, I think it’s just logical to see it at the top of the list. But for instance, there are only 3 services that are currently running in your phone including the display. If it takes up 40%, then the other two will take up the 60% yet the display will be at the top but it doesn’t mean the phone is draining its battery quicker.

50% of Galaxy S7 Edge battery used by Android OS

Problem: Battery drain has been significant after last update. Android OS has been using up to 50% of my battery. Tried clearing cache, but wanted to avoid system reset. Is there a fix to this?

Answer: It’s just like the problem I addressed above only that this time it’s the Android OS service that’s taking up 50% of the battery. Again, there’s no need to worry because it doesn’t mean the phone is draining its battery faster than usual. There’s actually nothing to fix here because there’s no problem; Android OS is supposed to be one of the default services that run during all the time so it’s just right to see it using the battery.

On the other hand, if your phone is actually draining the battery quicker and you’ve already done the wiping of the cache partition, then it’s time to reset the phone. I’m certain that should fix it.

  1. Turn off your Samsung Galaxy S7 Edge.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key. NOTE: It doesn’t matter how long you press and hold the Home and Volume Up keys, it won’t affect the phone but by the time you press and hold the Power key, that’s when the phone starts to respond.
  3. When the Samsung Galaxy S7 Edge 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. NOTE: The “Installing system update” message may show on the screen for several seconds before displaying the Android system recovery menu. This is just the first phase of the entire process.
  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.

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