How to fix your Samsung Galaxy S7 Edge whose screen turned black and unresponsive, other screen / display issues

The most common scenario is that the #Samsung Galaxy S7 Edge (#S7Edge) freezes a bit, lags a little, turns off and then the screen stays black and unresponsive. Owners immediately panic because the phone “won’t turn on” when in fact it’s powered on but just not responding to touch commands or key presses.

Screen or display problems are among the most commonly reported issues with high-end devices especially Samsung’s Galaxy line of phones as people or owners expect a lot from them as the company uses the display as its selling point. The S7 Edge has a Super AMOLED display and people think it’s the “perfect” display a smartphone can ever have. So, if it malfunctions, they become so annoyed.

In this post, I will tackle an issue that involves the Galaxy S7 Edge whose screen turned black without apparent reason. There will be other issues as well so if you have concerns regarding the display of your S7 Edge, read on as this post may be able to provide answers to your questions or solutions to your problems.

Here’s the list of the problem you can find in this article…

• Samsung Galaxy S7 Edge screen turned black all of the sudden, won’t turn back on
• Galaxy S7 Edge screen has green color, started to flicker, turned off and won’t turn on
• Black line appears on Galaxy S7 Edge screen then it started to flicker

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Samsung Galaxy S7 Edge screen turned black all of the sudden, won’t turn back on

Problem: I own a Galaxy S7 Edge that I purchased a few months ago. Everything went well, actually, until one day the screen just turned off or black and stayed that way for a couple of days. I was already panicking as I didn’t know what to do but two days later, the phone just displayed the Home screen. The same problem happened yesterday and now the screen is black, won’t turn back on and the phone won’t even charge. I thought the phone is powered down but it actually plays the message tone or rings when someone calls. So, it’s powered up and only the screen is powered off. What must I do to fix the problem?

Troubleshooting: For this problem alone, we have to look into a few things. The first is the apps. There’s a possibility that it’s caused by an app or a group of apps that keeps crashing that may also result to the crashing of the firmware.

The second thing we have to consider is the corruption of caches and data, which may occur during a firmware update. More often the phone would be stuck during boot up if some of the caches or data got corrupted but there were also reports wherein the screen is the one that’s greatly affected and this kind of problem may happen.
Lastly, there’s the possibility of a hardware issue wherein the display panel is no longer working the way it should. A technician is needed to diagnose it properly as tests will be done to figure out what the problem really is and what course to take to fix it.

With all that being said, I suggest you follow the step-by-step guide in troubleshooting a black and unresponsive screen with the Galaxy S7 Edge.

Step 1: Force reboot your phone to rule out the possibility of a system crash

Press and hold the Volume Down button and then press and hold the Power key. Keep both of them held down for 10 seconds until the phone reboots. If the problem was indeed caused by a firmware crash and if there’s enough battery to power it up, then the phone should reboot normally.

The Forced Reboot procedure is equivalent to the battery pull procedure that many owners of devices with removable batteries know about. It’s very effective in addressing problems caused by minor system issues such as this.

Step 2: Try charging your phone to rule out the possibility of drained battery

I understand you said the phone is powered up and only the screen is turned off but for owners who don’t have the same case as yours, it’s better that you try to charge the phone. Actually, you’re not just charging the phone for power’s sake, you’re also trying to find out how the phone responds if there’s current flowing through its circuits.

If the phone has a problem with its hardware, it may not be able to charge nor detect the current. Instead, it will remain unresponsive and the screen black.

Step 3: Run the phone in different modes

In this step, you are trying to find out if the phone is still capable of powering up its components. When the phone is booted up in safe mode, all third-party apps and services will be temporarily disabled. So, if the problem is caused by one or a group of third-party apps, the handset should be able to boot up without any problems. Here’s how you boot your S7 Edge in safe mode:

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.

On the other hand, if the problem is booted up in Recovery Mode, the Android interface is disabled so if the problem is with the front end, then your S7 Edge will be able to boot up in this mode successfully. This is how you do it..

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.

If the phone refuses to boot up in safe and recovery modes, then it’s time you send it in for checkup or possible repair. The technician may re-install or re-flash the firmware if the problem is caused by corrupt files and data. However, if the problem is due to a serious hardware problem, then everything depends on the findings of the tests.

Galaxy S7 Edge screen has green color, started to flicker, turned off and won’t turn on

Problem: So my S7 edge was working fine until suddenly half the screen was a see through green colour when I opened up a game .. after that the more I used my phone the worse it went , it started flickering white all over however the screen was responsive to touch . I turned my phone off for the second time and now it won’t turn back on … please help btw i’m not sure of my android version.

Troubleshooting: Hi! Many of our readers addressed their concerns about their device’s display, some used their phone for weeks and the issue occur. There are several reasons why it experienced display problem, from installed app by the owner, software updates from the manufacturer, or even a hardware defect. Hopefully, this is a software issue that can be resolved by the troubleshooting steps that we recommend performing later on.
Mostly, issue like this is hardware problem and we can’t perform any methods to fix it. And if the warranty of your device is still active then simply bring it to the nearest Samsung service center to have it diagnosed and if it’s possible for device exchange, then much better. We recommend trying to perform the troubleshooting procedure below as it may be help you resolve the issue.
This is not a guaranteed procedure but, if ever your device run to this mode, you can go ahead and backup all your data and you restore it after.
Step 1: Run in Safe mode
If the issue is triggered by the third party apps, this is the recommended procedure to remove the problem-causing app. Below are the steps to perform the method:

1. Make sure the device is turned off
2. Press and hold the Power key button, continue holding it until Samsung Galaxy S7 Edge appears on screen
3. When Samsung Logo display, release the Power key and quickly press and Volume down key
4. Continue holding the Volume down key after the device finish restarting
5. If you can see Safe Mode in the lower-side of the screen means it is activated.
6. Release the Volume down key
7. Uninstall the application that you think the culprit.
8. When it’s done uninstalling the apps, restart the device to boot up normally.

If this method didn’t resolve the issue, try the next step.
Step 2: Run in Recovery Mode and wipe cache partition
In this mode, you have the option to recover and restore your device to the setting before the issue occur. Steps how to do it below:

1. Turn off your phone
2. Press and hold the Home key + Volume Up + Power key altogether
3. Keep holding until Samsung Galaxy S7 Edge appears on screen, and quickly release the Power key but continue pressing the Volume up and Home keys.
4. When the Android Logo appear on screen release both keys
5. Navigate through options using Volume Up and Volume down keys
6. Select ‘wipe cache partition, press Power key to confirm
7. Wait until your device finish the process, it will take several minutes.
8. Select ‘Reboot system now’ when its done
9. This time be patient, restart after wiping cache partition takes longer than normal reboot

After performing the methods above and still didn’t work, try this procedure:
Step 3: Factory Reset
Now, this method is sometimes the last resort in resolving most of the issue experienced by the owners. The device will be back to factory default settings. But doing it is not that complicated, most owners are able to do it, the important and risky part for this method is the data stored in the device will be deleted like the pictures, messages, contacts, and more. So, before you perform this method, make sure that you made up your mind.
If these methods are not working for you, or it didn’t resolve the problem, we highly recommend bringing your device to the nearest Samsung service center in your area. If the device is still on warranty, then bring it with you, it can cover the repair or even they will issue a phone exchange.

Black line appears on Galaxy S7 Edge screen then it started to flicker

Problem: I was using my phone one day and then a black line appears in the center of my phone horizontally and it starts to flicker I didn’t think much of it until I locked my phone that’s when I tried to unlock it the screen decided to turn green and red and did want to show me the lock screen but after I restarted it started working but I can’t lock it because of it doing the same thing .. what can I do to fix it?

Troubleshooting: Hi! This issue is somehow one the common problems of Samsung Galaxy S7 Edge, most owners complained about it because most of them bought the device several weeks back before the problem started. Actually, we’ve received several emails about this problem and addressed them carefully, we have seen a lot of videos and comments about this issue and most of them are hardware issues or production defects.
There are cases that this problem occurs after the software updates, probably the data downloaded is corrupted or crashed. Hopefully, may be in your case it is a software issue then we can try to troubleshoot the device and restore it, if not, sad to say we don’t cover hardware issues.
We recommend performing the methods below, maybe it can help to resolve the issue you are in right now.

1. Turn off the device
2. Press and hold the ‘Power key’ + ‘Home key’ + ‘Volume Up key’ together
3. Wait until the Samsung Galaxy S7 Edge appears on screen and release ‘Power key’
4. When Android mascot will display, release both keys
5. Use ‘Volume Up and Down keys’ to navigate through options
6. Select ‘wipe cache partition’ and press ‘Power key’ to confirm
7. Wait until the process is finished, and select ‘Reboot system now’ option
8. The restart will take a few minutes, it takes longer than normal restart
9. Wait until you are on the main screen

If this method wasn’t able to resolve the problem, we can try to hard reset the phone, it will restore to the factory default setting and will delete all the data stored in the device. If all else fails, then bring the phone to Samsung’s service center or send the phone in for repair.

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