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Galaxy S7 screen is defective, does not register touches accurately, won’t send photos, other issues

As we continue to bring you more #GalaxyS7 issues and solutions, here’s another article for you. Like in the previous posts, the issues discussed come from reports of our community members so we hope we were able to provide good solutions for them here.

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 edge screen won’t turn off, showing colored lines

The graphics on the ‘edge’ (right side) is permanently on even though I have all the Edge Screen features turned off. In fact you can see individual streaks of coloured lines which randomly change colour for no reason. It is as though its a graphic card failure. Even in sleep mode it’s on – either bright purple or green lines and there is no reason for it to be on. The colour overwrites ALL other display on the screen. Any help would be much appreciated. — Webbie047

Solution: Hi Webbie047. This screen behavior is usually indicative of hardware malfunction. If your S7 edge was physically impacted or dropped before, chances are the edge screen has been damaged.  Do a factory reset and see what happens from there. If the issue remains immediately after a factory reset and when there are no apps installed, you must contact Samsung to have it repaired.

For reference, here are the steps on how to factory reset your phone:

  1. Create a backup of your important files such as photos, videos, contacts etc. You can use Smart Switch for this task.
  2. Turn off your Samsung Galaxy S7.
  3. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  4. When the Samsung Galaxy S7 shows on the screen, 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. Using the Volume Down key, navigate through the options and highlight ‘wipe data / factory reset.’
  7. Once highlighted, you may press the Power key to select it.
  8. Now highlight the option ‘Yes — delete all user data’ using the Volume Down key and press the Power button to select it.
  9. Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
  10. The phone will now reboot longer than usual.

Problem 2: Galaxy S7 edge screen stays black, won’t turn on

I’m using an S7 edge for the last 1 and half year but during this time i faced a lot of issues relating my phone.

First, i had an issue with the screen when i faced black line on the screen. the cell was under warranty so they changed the display as thy told me that it’s display has been crashed.

Then i faced a problem with hands free socket, i.e.,   while using hands free, outgoing call was not communicating while i can listen incoming calls

Third issue i faced is with dual SIM jacket. Sometimes just one SIM is working while the other stops working by itself

Fourth problem which am facing right now is that the screen gets freeze and then black after some time. i went to nearby Samsung service centre to update the software as thy told me its software problem but after 2-3 days working without interruption, it again started doing the same. Even i press the volume down and power button for more than 1 minute but it’s not working. I tried to press volume power and and main menu button (on front) but still its screen is black for the last 2 days. Unfortunately its warranty is also finished. Kindly show me some way out. — Muhammad

Solution: Hi Muhammad. The issues, when taken together, may have one and the same cause and that is an unknown hardware malfunction. We don’t know the full history of your device so there’s no way for us to identify what may be causing these problems. The most that you can do right now is to do a factory reset and observe the phone. Should these problems return, that means that you have a bad hardware. A technician needs to do a thorough hardware check in order to know where the problem lies. We can’t do that remotely so you really don’t have much choice in this one. We suggest that you return the phone to the shop that did the display replacement since they already know the history of your device.

Refer to the steps above on how to factory reset your phone.

Problem 3: Galaxy S7 screen is defective, does not register touches accurately

Third try it’s typing a letter off over or down-r gets a t-taping the x backspace repeatedly zooms screen and it won’t unzoom screen slides around erratically going sideways when scroll vertically spellchecker acting crazy filling in ie toll-free for toll-) I had to put the paran.there because it changed to toll-free when i tried to do the example also it seems to act like what ive seen of people playing games with rats-remote admin tools. A little mindful and inspired in the way the screen moves around as if on it’s own and switching or selecting when I haven’t a shade less than random or coincidental when im sure i just typed less up there i look back and see led ( like in around) repeatedly typos i dont think i did and that dont should have an auto ‘ maybe not sure its not my kind of fun i just typed kind and got kond could but have had the keyboard just typing off whole words when troed to correct it it kept typing a letter off type r and get t and every letter is a key off over or below. — Eero

Solution: Hi Eero. We don’t think we understand exactly what you’re trying to communicate here but if your screen does not work properly, you should consider sending it in. we assume you’ve already tried the basics but if you haven’t, you should do the following:

  1. wipe the cache partition
  2. boot to safe mode and observe the phone
  3. boot to recovery and do a factory reset

Wiping the cache partition should be the first troubleshooting that you should try. Here’s how:

  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.

If the screen behaves erratically, you can also try observing your S7 while it’s booted to safe mode. If the cause of the problem is one of your third party apps, the screen should work normally. To boot 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.

Just like in most Android troubleshooting, the last and ultimate step that you can try is factory reset. If the issue is still there following the procedure, you should have the screen repaired. Just forget about DIY (do-it-yourself) repair. A lot of them do not end up positive so just let a professional do the job for you. Sure you can find videos in Youtube on how to replace a screen and they appear easy to do but again, appearances can sometimes be misleading. If you think you can handle DIY repair though, go ahead.

Our blog does not provide hardware solutions including DIY tutorials so please look for sites like iFixit or Youtube to walk you through the process.

Problem  4: Galaxy S7 edge charges very slowly

I have a Galaxy S7 Edge. It has been charging in about 6 to 8 hours on wireless charger. Now it won’t charge overnight and says it needs 24 hours plus to reach full charge. I have NOT installed the upgrade nougat because of all the issues that I’ve heard about it I’m still running on 6.0.1. I’m afraid to upgrade to nougat because the last two phones I’ve had after the upgrade I have had lousy performance and short battery life to the point I ended up turning the phone in. — Jdelockery

Solution: Hi Jdelockery. The first thing that you want to do is to recalibrate the battery. This will retrain Android in detecting the true battery levels. Sometimes, Android can lose track of actual battery levels so recalibrating might help. Here’s how:

  1. Use the phone by playing games or doing tasks to hasten power discharge, until the phone turns itself off.
  2. Charge the phone without turning it back on.
  3. Wait until the battery says it is fully charged to 100%.
  4. Wait for an hour before unplugging the phone from the charger.
  5. Use the phone until battery reaches 0% percent. The phone should turn off by itself.
  6. Recharge the phone to 100%, wait for an hour before unplugging it again.
  7. The battery should now be recalibrated. Observe how phone works.

Next, you want to check if fast charging feature is enabled. Just go Settings>Device maintenance>Battery>Advanced settings.

If fast charging feature is already enabled, then the next best thing to do is factory reset. If that won’t fix it either, then you can assume that either it’s a battery issue, or a motherboard malfunction. Either way, you’ll need to have the phone repaired.

Problem 5: Galaxy S7 won’t unlock screen, won’t accept PIN, fingerprint

My Samsung Galaxy s7 updated at 6am this morning and now my pin to unlock my phone. I am absolutely 100% sure that this the correct been because I have not changed it since I purchased the phone. My fingerprint unlock isn’t working either. I’ve tried restarting the phone and completely powering off. Nothing is working. I only have 3 more attempts before my phone factory resets. I’ve tried to go online to find some suggestions but I haven’t found anything but I have noticed that this is a common problem amongst Galaxy users — Jameraewing

Solution: Hi Jameraewing. There’s no way to unlock a Galaxy S7 edge that’s secured by a PIN or fingerprint. You must either do a factory reset or follow two alternate ways to unlock the PIN. These options require that your phone is connected to the internet, either via wifi or mobile data. If it’s not, just forget them and do a factory reset.

Samsung Find My Mobile option

Find My Mobile is Samsung’s equivalent to Apple’s Find My iPhone. Basically, it works by resetting the password temporarily and bypassing the lock screen.

  1. Register the Galaxy S7 with Samsung
  2. Use the Find My Mobile service to temporary reset the password
  3. Bypass the lock screen using the new temporary password
  4. Set a new password.


Android Device Manager option

Most Android devices can use this option because a user usually needs to input a Google account when setting up a phone the first time. Like Find My Mobile, ADM also requires that your phone is connected to the internet in order for it to establish a connection to Google servers. Make sure that you enter the correct Google account credentials. Below are the steps:

  1. In your computer, visit the Android Device Manager page.
  2. Find your Galaxy S7 phone in the screen.
  3. Enable Lock & Erase feature. Follow on-screen instructions to lock your phone
  4. Set a temporary password.
  5. Enter the temporary password.
  6. Create a new password.

Problem 6: Galaxy S7 edge won’t send SMS, keeps saying sending failed

New S7 edge on Straight Talk CDMA service. My text messages were working fine. Now when I send a message it sits there then says failed, however the message actually sends. How do I fix that so I know my messages sends? I’ve cleared cache restarted everything I’ve read. — Amanda

Solution: Hi Amanda. Did you clear the data of the messaging app? If you didn’t make sure that you do. If that won’t fix the problem, proceed to factory reset. If the problem returns after a factory reset, then try using a different messaging app like Facebook Messenger or Google Hangouts.

Problem 7: Galaxy S7 won’t charge, charging port not working

My phone is 3 years old. It has been having charging issues for a while now. I’ve tried new chargers and phone still won’t charge. I wiggle plug and once in a while it charges for a minute. Love the phone but don’t know what to do. Can you help? –Kim

Solution: Hi Kim. If the phone charges briefly when you wiggle the cord, the most likely problem is a bad charging port. Contact Samsung and let them check the phone. A charging port replacement may be needed to fix this one.

Problem 8: Galaxy S7 won’t send photos, won’t download photos

I cannot send pictures, download pictures or anything whether it be via email or txt message. I keep getting a failed download. I have gone on to my APN changed all the settings to giffgaff settings but still doesn’t work. it’s a recent thing as well and I haven’t changed anything. — Andrewxo

Solution: Hi Andrewxo. Your phone’s photo managing service may have stopped working or got corrupted so if you’re positive that you did not do anything different prior to noticing the problem, we suggest that you do a factory reset. This way, everything, including the service/s that handles photo sharing and downloads are returned to their known working state. See the steps above on how to factory reset your phone.

Problem 9: Galaxy S7 not showing pop up notification for incoming SMS

S7. I get my messages and can send them. It clicks to let me know I received a message but doesn’t pop up on my screen like it used to. It use to pop up even when I was texting someone but now I have to hit the back button to get to my messages. And if phone is off I need to turn it on to retrieve the message. — Patricia

Solution: Hi Patricia. Make sure that you set the messaging app you’re using to show notifications. We assume you’re running Android Nougat so here’s how to do that:

  1. Open Settings app.
  2. Tap Apps.
  3. Find the messaging app you’re using and tap it.
  4. Look for Notifications section and tap it.
  5. Be sure that Allow notifications slider is ON.
  6. If you want to receive notification while the screen is locked, tap On lock screen and select Show content.

If your messaging app is already configured properly and the problem returns, you may need to clear the app’s cache and data. Check the steps above on how to do it.

If nothing works, don’t hesitate to do a factory reset.

Problem 10: Galaxy S7 edge froze and won’t detect SIM card

Galaxy S7 Edge. Went to France and had a SIM card for French#. Worked great. On my way home, I changed the card back to my original card and now it doesn’t recognize it. I can’t use the touchscreen or turn it off. Help! What do I do? Thanks. — Kristen

Solution: Hi Kristen. Looks like your phone is frozen. You must try to do a soft reset to restart it. Simply do the following:

  1. Press and hold the Power and Volume Down buttons until the Maintenance Boot Mode screen appears (approx. 10 seconds).
  2. 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 to select.

If your phone still fails to re-instate the configuration for the original network, contact your carrier for support.

Problem 11: Galaxy S7 missing link preview in Messages app

I use to be able to see a website preview in my text messaging when a link was posted – but I had to do a factory reset and now all I see is the link. Is there a place I can go too in order to change that so I can see the website preview again? I can’t find it. Thank you so much for your time. — Jennifer

Solution: Hi Jennifer. At this time, link preview in Galaxy S7’s stock messaging app is non-existent. It’s only available in Galaxy S8 and S8 Plus. Until Samsung decides to add this feature again in older devices, all we can do is wait.

Problem 12: Galaxy S7 screen loses sensitivity when entering PIN

When I reset my Galaxy S7, when I get to the part to enter my password to start my phone, the enter button won’t work. like I hit it over and over until it finally works. I have factory reset and cleared my cache and booted on safe mode and still done it. Is there any way to recalibrate the screen? — Ddl1978

Solution: Hi Ddl1978. Have you tried a factory reset? If you haven’t make sure that you do.

Screen calibration is not supported in Samsung Galaxy S and Note phones. You either have a working screen or not. If the screen’s sensitivity has become problematic, you should send the phone in for repair.

Problem 13: Galaxy S7 camera won’t focus after camera screen was shattered

Yesterday, the little screen on my camera shattered. Unfortunately I’m not sure how. I gently removed it and the glue strip behind it and ordered a replacement. When I open the camera app now it doesn’t focus. I’ve tried both pro and auto mode. Is this because the screen is missing or has the camera itself been damaged? — Melanie.taylor

Solution: Hi Melanie.taylor. In order for the camera to focus properly, it needs a clear lens and glass cover. If the cover is obstructed and the camera can’t identify focus points, focusing may not work even if the camera itself is intact. Make sure that the lens is not obstructed by removing the broken glass cover. If that won’t work still, you can assume that the camera is broken. In that case, you must have the phone repaired.


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