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How to troubleshoot Samsung Galaxy S7 that won’t turn on [Step-by-step Guide]

You’re staring at a black screen on your new #Samsung Galaxy S7 (#GalaxyS7), wondering what to do because it turn on when you press the #Power key and it won’t respond no matter what. It’s new and it was working fine yesterday, left it lying on the table overnight with enough battery but in the morning, the screen is just black. What could have happened?

A few days after the Galaxy S7 was released, there were already owners that complained about their devices that won’t turn on. In fact, we already received a few complaints about this problem and so we publish this troubleshooting guide to address this very specific issue encountered by our readers. Read on to learn more about this problem and how to fix it.

Problem

Hi! I have the new Samsung Galaxy S7, it’s still 5 days old and it has been working since day 1 without issues until today. The screen is black and it looks like it has turned off. I tried to turn it on but it won’t. Tried charging it but it won’t respond either. I know I can go to the store where I bought it and have it replaced but it’s a 40-mile drive, so I want to try a few things first before heading out. What would you suggest I do to try to fix this problem? Thanks.

Symptoms and Possible Causes

Aside from the obvious black and unresponsive screen, there are other symptoms you may encounter when your new phone has this problem:

  • LED indicator is lit up but the screen is black and unresponsive
  • Screen is black, LED indicator is not lit and phone won’t turn on if Power button is pressed
  • You can hear the notification sounds but the screen is black
  • Device just turn off on its own and refused to power back up

This issue is common to all smartphones. In fact, we did receive hundreds of issues from our readers who encountered this problem using previous Galaxy models and among the most common causes are the following:

  • Battery completely drained that it takes a few minutes before the phone responds to the charger when plugged in
  • The Android system crashed leaving the phone unresponsive when the power key is press or if the charger is plugged in
  • Some downloaded apps keep crashing that also caused the system crash
  • The power key got stuck or damaged after the phone fell on a hard surface

Now, before we head to the instructions on how to troubleshoot this problem, if you have other problems visit our Galaxy S7 troubleshooting page as we may have already addressed your concern. Or, you can directly contact us by filling out this questionnaire. Please provide all relevant information about the problem so we can provide you with an accurate solution.

Step-by-step Troubleshooting

More often than not, won’t turn on issues are caused by system crashes. When it happens, the device won’t respond when you press the Power key and it won’t charge if you plug it in. It’s because the firmware plays a big role in starting up the hardware as well as charging the battery. So, here’s what you need to do in case this problem occurs…

First step: Force restart your Galaxy S7

By pressing and holding the Volume down and Power keys together for 10 seconds, your phone will perform the simulated battery disconnect. It’s just like when you pull the battery out of your phone to reset it.

This procedure is hardwired so it should work as long as it’s done correctly. Again, just press and hold the Volume Down and Power keys together for 10 seconds to do this.

Moreover, the Forced Reboot procedure will refresh the phone’s memory so whatever firmware and/or hardware glitch that occurred would be fixed immediately.

What if the forced reboot procedure failed?

Second step: Plug in your Galaxy S7 to charge

Maybe the reason why your phone turned off and won’t turn back on is because the battery got drained. It might also be the reason why the Forced Reboot procedure failed. So, it’s time you plugged the charger in and leave the device for, at least, 5 minutes before attempting to turn it on.

After 5 minutes of charging, try turning on your phone and if that won’t work, try the first step again.

Third step: See if the Galaxy S7 can boot in Recovery Mode

Now, this procedure will tell us whether it’s just a firmware issue or a serious hardware problem. In recovery mode, the Android GUI won’t be loaded during boot up but all the essential components will be powered up. So, if the phone boots up in recovery mode, it means the problem is with the firmware, probably. Otherwise, it’s a hardware problem.

  • Press and then hold the Home and Volume U 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.

If the phone can successfully boot up in recovery mode, proceed with wiping the cache partition using the Volume keys and the Power button to select the option and then try to boot up normally. However, if the recovery mode procedure failed, proceed to the last step.

What if the phone refused to boot up normally after the recovery mode?

Fourth step: Try booting the Galaxy S7 in safe mode

There’s a chance the problem was caused by a third-party app that may have crashed considering there are still apps in the Play Store that have compatibility issues with Android M (Marshmallow). In this case, you need to boot your phone safe mode just to see if it can and to rule out the possibility of the hardware problem once and for all.

  1. Press and hold the Power key.
  2. As soon as you can see the ‘Samsung Galaxy S7’ 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.

If your phone successfully booted up in safe mode, try to uninstall suspected apps. Or, you can proceed with Factory reset through Settings or Master reset by booting up your phone in recovery mode again. Either way, the problem will be fixed. However, if the safe mode boot up was unsuccessful, then the last option is the last step.

Last step: Have the technician troubleshoot the problem or have the phone replaced

At this point, you did everything you could to try to fix the problem without compromising the phone’s safety and voiding the warranty. It’s time you went to the store where you bought it and let the technician check it for you. If the problem can’t be fixed by the tech, you will receive a replacement unit.

Having problems with your phone that won’t turn on?

We can help you troubleshoot. We already published troubleshooting guides for the following devices:

Phone Won't Turn On Troubleshooting

We are always willing to help our readers out so if you have problems with your new Samsung Galaxy S7, don’t hesitate to contact us by completing this form.

60 Comments

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  1. Thanks for the post of how to fix Galaxy = got it to reboot after going through directions. Saved a trip to the store tomorrow.

  2. The volume down and power button worked a charm, tried everything else and was about to give up and bring it to a repair shop.
    Massive thanks!

  3. Mine is still black. No response. I’ve tried all your options. This happened a w
    Hill back and it fixed itself.. but now it’s happened again. I’m on holidays overseas.. I’m really disappointed with Samsung now.. I’ve never had iPhones and always had Samsung but this time I’m really upset. Might try a trip to the Samsung shop, maybe they help

  4. Thank you so much – I followed your steps and the phone is back and working.
    Much appreciated

  5. Wow! I worked- thank you so much, I really did not know what to do.
    The first suggestion worked for me!

  6. Hey,
    I went true all options.. still not working.

    My s7 was black screen, so i did the regular reset, first time i press volume down to restart, when it didnt, i press volume up to download..
    Since that moment, my device is dead.
    Nothing works.
    Can you please help me?

  7. This phone did not power on out of the box. It vibrates every 10 seconds or so. I have tried all the troubleshooting steps but no change.

  8. This is the first time EVER… I actually came to a troubleshooting/help site that REALLY did fix the issue… THANK YOU VERY VERY MUCH!!!!

  9. Mine is not responding at all, I’ve tried it all. Thanks. I’m extremely disappointed with my Samsung 7, I’m ready to run it over with my car. I prefered my S5. Should of kept it.

  10. alhamdulillah. thought the phone has been short circuit coz i’ve hard pull the cable while charging.
    thanks for the help. god bless u all

  11. my s7 is not working even after i have wiped all the data . My phone is not stuck in a constant boot loop and wont even go to the samsung logo . what do you think is the issue and how much money do you think Samsung would charge me to fix the issue.

    THANK YOU

  12. Thank you!!! Was already researching the warranty replacement process.. 😛 Up and running again!

  13. I’m deployed in the middle east and you saved my life! I thought it was because of the extreme heat….I went to my S6 (IT folks) nope, went to two local national cell phone repair shops nope, and basically anyone who would listen to my plight nope…I finally stumbled on your site and it works! And why isn’t this common knowledge? Chukran!

  14. When I woke up and my phone was HOT and unresponsive, I was panicked! I found your article, did Step 1 and it WORKED! I think I love you. Thanks.

  15. thank you for the help, pressing the volume key down and power key works for my phone. my heart stop for a moment when wake up to a dead galaxy s7 lol

  16. Mine is still not working afte doing this……been using my s7 edge since April last year and today it went blank,can’t power on,charge …..what do l dodo?

  17. my galaxy s7 the screen is all black bu the led is still on so and when i try to reboot it the screen black but the LED still changes colors

  18. Iv had my phone for 6 months last couple of months it keeps freezing getting hot will not turn on . iv done all trouble shooting with no joy phoned voidafone been in shop twice and there saying nothing they can do . not happy

  19. I have NO IDEA what’s wrong with my s7. The screen went black and a pulsing blue led came on and it’s been like this for HOURS. I tried everything and I think I did it all right but it still is unresponsive to everything.

  20. My husband’s S7 active got a few rain drops on it. At that time the screen was on in Spotify listening to music. He turned the screen off to wipe away the small amount of water. Now the screen is black. However it still respondes to touch. I called. He was able to answer. please help

  21. Excellent advice, saved my day and a visit to the operator and lots of troubles. I had my Galaxy S7 Plug in to charge when I did the first step and that did the trick. So, apparently battery was drained by system crash. This incident reminded me also of the importance of backups… Thank you so much! 🙂

  22. Excellent article… to be fair I didn’t read it all… because it worked at step 1!!!😃

    I didn’t realise how powerful my beloved S7 is at affecting my mood!😥 perhaps some counselling is in order 😐! Any who, now I can get back to enjoying my weekend.

    Thanks Droid Guy 🤗

  23. The it solution worked for me, I only experienced this once before on my S6. I have only had my S7 a few weeks & really hope it’s a one off. Thanks for your advice, you saved me an unwanted trip out and a working phone from the start of business hours.

  24. i have s7 active, woke up in middle of night to black phone with green lit led and tried everything to turn my phone on, nothing will work. i dont know what happened, it was fine before bed, but happy I woke up because my alarm wouldn’t of gone off, taking my phone in tomorrow. so mad this happened!

  25. My phone attempts to reboot but gets locked at the decrypt stage, tried to hard start, but it gets to the decription page and forces me to enter my security code, so I cant start in safe mode.. Any ideas?

  26. Thanks, dunno why mine did this but rather than panic, look on google, ur site came up first and it worked.
    Saved me alot of time.

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