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Galaxy S7 screen has green lines running on top and in the middle, reboots when playing a game, other issues

For most people, a phone’s screen is usually the most important consideration when buying a smartphone these days. This is also one of the reasons why Samsung’s latest flagship, the #GalaxyS7, remains at the top of its class. However beautiful an S7’s screen though, it sometimes can also become a source of frustration for some users. This post shows you why that is for a certain user. We also bring 5 other S7 issues in this material so we hope you’ll find this helpful and interesting read.

Below are the topics we cover for you today:

  1. Solution to Galaxy S7 speaker issue due to faulty SD card
  2. Galaxy S7 edge stuck in boot loop after an update
  3. Accidentally dropping resulting to damage of Galaxy S7 voids Samsung warranty
  4. Galaxy S7 won’t charge | Galaxy S7 stuck in charging screen (with yellow triangle icon)
  5. Galaxy S7 screen has green lines running on top and in the middle
  6. Galaxy S7 reboots when playing a game

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, or you can install our free app from Google Play Store.

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: Solution to Galaxy S7 speaker issue due to faulty SD card

Just thought I’d pass this on. Recently purchased Samsung S7. Worked fine. Then I noticed speakers seemed lower, then it got louder with extremely crackly or static plagued sound but very intermittent. Finally decided I should return to Verizon store. They said they had some other S7s people bought in with similar issues and they helped me setup a process to mail me a new phone. When I got home I decided to remove the SD card I had installed from my old phone, which contained a lot of music. When I removed the SD card, I noticed I could hear the tapping sounds again when I typed. So I played some songs and ringtones and sure enough, the sound was working fine again. It appears that some issue with SD card was the culprit. I can’t figure out how a memory card could interfere with audio but it was repeatable. So you may want to pass on to your readers. — Doug

Solution: Hi Doug. We’re glad to hear that you fixed the issue on your own. We agree that there’s no logical explanation why an SD card will affect the audio function of a smartphone, but since you said the issue can be replicated, we’re going to publish this. We may not be able to give an explanation why this is so, but we’re definitely happy to share your experience. We hope that other users experiencing the same or similar problem will come across this post in the future.

Problem #2: Galaxy S7 edge stuck in boot loop after an update

Hello DG! Last night, I was on my S7 edge around 12:30 and then put it down. Around 2:30, it lit up because it was restarting. I hadn’t touched it in over two hours. When I tried to put in my password to unlock it, it switched to a black screen with “Installing system update.” After that it went through a series of various loading and rebooting screens, but nothing ever actually finished loading before the phone would crash. Since then, I can’t get any kind of response out of it. I have tried a “battery pull,” a soft reset, rebooting it in safe mode, and rebooting it in recovery mode. I have also tried plugging it into both a wall outlet and my laptop. Nothing is receiving a reaction, including my laptop when I plugged it in. I just don’t know what else to try. Thank you for your help! — MF

Solution: Hi MF. So what happened after booting the phone to safe mode and recovery mode? You can’t just say that and leave us guessing. Were you able to boot the recovery mode and tried cache partition wipe or factory reset? If nothing happened, especially after a factory reset, then the only thing that you can try on your end is to try flashing a stock firmware. If you haven’t done that before, use Google to find a good tutorial on how to do it.

If flashing is unsuccessful and the phone continues to reboot randomly, find a way to have it replaced.

Problem #3: Accidentally dropping resulting to damage of Galaxy S7 voids Samsung warranty

Hi. I have an S7 that has been freezing about 10 seconds after I turn it on, no matter what I do. I’ve turned it on in Safe Mode, and have tried resetting it but the phone just freezes after 10 seconds. I’ve sent it to a repair shop and they’ve told me that it was a software issue, but a week later, they told me that it was a mainboard issue and that it overheated. I’ve dropped my phone and the rear glass cracked but it functioned well even 2 months after the drop. What do you think could be the problem?

Also, if I were to send it to a Samsung contact centre, would it still be covered under the warranty (the mainboard not the rear glass)? Am very desperate to know what is wrong with my phone. Thank you so very much! — Wan

Solution: Hi Wan. If a non-Samsung service center has already examined the phone and told you that there’s a hardware problem, it’s most likely true. Keep in mind that if the problem is on the software side, doing a factory reset should have fixed the problem by now. That you dropped your phone before does not help either. Like water damage, accidental drops can have a short-term and long-term effects depending on the damage. Hardware damage cannot be fixed by doing software hacks on your end, obviously. This makes the phone either an expensive paperweight at this time, or something that needs repair to get going again. If what the third party repair shop said was true, that the motherboard has been damaged, then the repair and replacement of parts can be a very expensive proposition. Sometimes, phones don’t work properly even after a repair so it’s also a risky operation. If you’re lucky, you may be able to use the phone normally again after the motherboard has been replaced.

Sending the phone to Samsung service won’t help you financially too. Accidentally dropping a Samsung device is considered customer misuse, thus automatically voiding the warranty. This means that if you let Samsung repair the device, you are still going to pay hundreds of dollars, especially if the motherboard has to be replaced.

Problem #4: Galaxy S7 won’t charge | Galaxy S7 stuck in charging screen (with yellow triangle icon)

Hello. So I had my phone and it had been working fine and then just yesterday it stopped cooperating. While I was at work my phone died because the battery drained. When I got home to charge it, it wouldn’t charge. Instead the battery charge symbol would turn on for five seconds, then turn off for 10 seconds and it would cycle this way until removed.

I came to this site to try and trouble shoot it and so I tried the steps. First, when I cleaned the lint and whatnot out, my phone acted differently. When I tried to charge it, the charging animation came up but for 30 minutes it stayed at 0 and then it shut off and went back to the charging indicator cycle (5 on, 10 off). I let it do this for ten minutes to see if maybe anything would change (which it did not).

I then turned on my phone to see if anything happened, and my phone was at 7 percent. While it was on, it went from 7 percent to 0 in about 3 minutes and the screen and battery bay were really warm. Then I tried a soft reset and re-cleaned the pins and the charging port. After I did this and plugged my phone back in, the yellow triangle charge icon showed up and that is where I am stuck. Any Ideas? — Seanmalota

Solution: Hi Seanmalota. We don’t know how old your phone is at this time but if you’re not careful when plugging or unplugging the charging cable from the USB port, you may be looking at a bad charging port as the cause of this problem. Your description of the situation seems consistent with a damaged USB port. Since there’s no direct way to check the actual condition of the said component, you must try other indirect troubleshooting steps to help you check if our hunch is correct.

The first thing that you want to do in this case is to try other chargers. If you can find an original charger for an S7, that’s better.  Your aim is to check whether or not the current charger you’re using is bad.

If using another charger won’t change anything, the next best thing to do is to boot the phone to safe mode. Not only will it help you check if a third party app is the culprit (very highly unlikely), but it can also aid in checking if restarting the phone to a different software environment will make any difference. Here’s how to do it:

  • Charge the phone for at least 30 minutes.
  • Press and hold the Power button.
  • Once the ‘Samsung Galaxy S7’ logo appears, release the Power key and immediately press and hold the Volume Down button.
  • Continue holding the button until the phone finishes rebooting.
  • Once you see the text “Safe mode” at the bottom left corner of the screen, release the Volume Down button.

If the phone remains stuck or won’t charge at all, visit your nearest Samsung or third party service center so the hardware can be checked.

Problem #5: Galaxy S7 screen has green lines running on top and in the middle

About a month ago, I was outside in very cold weather for about an hour and a half. That was the first time I noticed my phone became unresponsive. I moved it to my chest pocket where it warmed up and eventually the screen turned on. Since then I’ve noticed flickering on the lowest level lighting. And in the last week, whenever it has sat for awhile (typically a few hours or overnight), when I press the power button or the home button, the screen zaps…green lines across the top and/or middle. The screen is black, and the blue lighted touch buttons at the bottom go out, then turn on. The volume buttons seem to work (tones when pressed), seems as if the only thing not working is the screen.

I ran a scan of the phone to clean out any bad files and check malware. I take care to close apps after each use. I never let apps just run in the background continuously. Should I be looking for a new phone? I’m really happy with my S7. I’m not sure of my operating system — Mszornyi2

Solution: Hi Mszornyi2. One of the ways to check if those green lines that runs on top and in the middle of the screen are signs of a bad screen assembly is by booting the phone to another mode. If those unnatural lines will persist while the phone is restarted to recovery or download mode, that’s a sure indication of a bad screen. In this case, you must have the phone checked by Samsung so they can decide if they should replace the defective component or just replace the entire phone altogether.

To boot the phone to either Download or Recovery mode, follow the steps below:

Boot in Recovery mode:

  • Charge the phone for at least 30 minutes.
  • Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  • When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  • When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  • Using the Volume Down key, navigate through the options and highlight ‘wipe cache partition.’
  • You can either wipe the cache partition or do a factory reset when in this mode.

Boot in Download Mode:

  • Charge the phone for at least 30 minutes.
  • Press and then hold the Home and Volume DOWN keys, then press and hold the Power key.
  • When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume DOWN keys.
  • Wait until the Download screen appears.

If the issue happens to lie on the touchscreen, you can also check it by accessing the service menu. Here’s how:

  • Open the Phone app.
  • Dial “*#0*#” (without the quotation marks).
  • Tap the Touch box.
  • You’ll then see an “X” inside a rectangle. Try to run your finger on the portion of the screen where the green lines usually occur to see if the touchscreen will register your input. If there’s an unbroken line in the portion where you ran your finger, that’s an indication that that part is working.

If you think that touchscreen is bad, you also need to have the phone either repaired or replaced.

Problem #6: Galaxy S7 reboots when playing a game

I have a Samsung S7 and today it started to glitch. I had it plugged in for most of the afternoon (about 4 hours). One of my children dropped it behind my couch and my oldest got it out and gave it to me. Here is when the problems started. I notice that it was turned off, which I never do. When I turned it back on, it had the droid in the middle of the screen and said “downloading do not turn off target.” I left it alone for about 10 minutes and nothing happened so I turned it off and back on again. All seemed fine until I tried to play a game (Simpson’s: tapped out). It lets the game load but when I start playing it shuts off the phone after about 3 minutes. When I try and turn it back on it shows me a battery on the screen, but it’s not plugged in. And eventually, after a few minutes I’m able to turn it back on, but if I play the game it keeps turning off. 

What happened and how do I fix this?! Thanks. — Victoria

Solution: Hi Victoria. Does the issue only happen when you’re playing this game? If the answer to that is yes, try to delete the app’s cache and data and see what happens. Here’s how it’s done:

  • Open the Settings menu either through your notification shade (drop-down) or through the Settings app in your app drawer.
  • Navigate down to “Apps.” This may be renamed to something like Applications or Application Manager in OEM skinned versions of Android 6.0.
  • Once in there, click on an application.
  • You’ll now see a list of stuff that gives you information about the app, including Storage, Permissions, Memory Use, and more. These are all clickable items. You’ll want to click on Storage.
  • You should now clearly see the Clear Data and Clear Cache buttons for the application.
  • Play the game again.

If your phone continues to restart when playing the game, or when using any other app, the next logical thing to do is to wipe the cache partition. Doing so will force the phone to delete the old system cache and build a new one. Sometimes, a corrupted system cache can lead to all sorts of problems so it’s best to keep the system cache fresh. If you haven’t tried it before, follow these steps:

  • Turn off your Samsung Galaxy S7.
  • Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  • When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  • When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  • Using the Volume Down key, navigate through the options and highlight ‘wipe cache partition.’
  • Once highlighted, you may press the Power key to select it.
  • Now highlight the option ‘Yes’ using the Volume Down key and press the Power button to select it.
  • Wait until your phone is finished doing the Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  • The phone will now reboot longer than usual.
  • Observe the phone again.

Should the issue remains after wiping the cache, the last thing that you want to do is factory reset. As the name implies, all software settings will be restored to their original, factory state. If a glitch was introduced after you’ve unboxed the phone, factory reset should eliminate it. That means that the problem should not be there right after a factory reset. Follow these steps on how to factory reset your S7:

  • Create a backup of your important files and contacts.
  • Turn off your Samsung Galaxy S7.
  • Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  • When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  • When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  • Using the Volume Down key, navigate through the options and highlight ‘wipe data / factory reset.’
  • Once highlighted, you may press the Power key to select it.
  • Now highlight the option ‘Yes — delete all user data’ using the Volume Down key and press the Power button to select it.
  • Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  • The phone will now reboot longer than usual.
  • Observe the phone without installing anything.

If the problem remains, an unknown hardware problem must be the cause of this trouble. Keep in mind that overheating can also cause a phone to shutdown automatically. This is a mechanism designed to prevent damage to internal components due to heat.  If your phone gets warm while playing, there’s a chance that overheating is actually the reason for the unexplained shut down. You can either stay away from the game, or contact its developer so they will know that their product is way too demanding for the hardware.

If the phone is not overheating but continues to restart even after a factory reset, send it to Samsung for repair or replacement.

 


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