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How to troubleshoot your Samsung Galaxy S7 that doesn’t charge or charges very slow [Troubleshooting Guide]

Not charging and slow charging issues with the #Samsung Galaxy S7 (#GalaxyS7) are among the most common power-related problems reported to us by our readers. Any user can encounter this problem since the battery deteriorate over time but then again it would take at least a couple of years before it starts to show signs that it’s no longer functioning well.

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In this post, I have tackled these very issues. So, if you own a Galaxy S7 and are currently bugged by a charging problem, read on to see if one of the problems I addressed here applies to you. But please note that this is a troubleshooting guide and there’s no guaranteed fixj. While we offer safe troubleshooting procedures, things may happen unexpectedly due to human error so please proceed at your own risk.

If you have other concerns, however, make sure you drop by our S7 troubleshooting page for we have already addressed hundreds of problems with this phone. Try finding issues that are related to yours and use the solutions and troubleshooting guides we suggested. If they don’t work or if you need further assistance, you can always contact us by completing our Android issues questionnaire. Make sure you provide us with necessary information about the problem so that we can help you better.

Fix your Galaxy S7 that no longer charges when plugged in

Problem: It just started. My Galaxy S7 no longer charges when I connect my charger to it. I don’t have a clue what caused it or what the problem is let alone fix it. I am planning on bringing it back to the store but until then, if you can help me with it, then it would be a great help. Thank you!

Troubleshooting: There are several factors to consider about charging problem of your Galaxy S7 device. And it takes some time to determine the culprit, that is why it is important to have more patient. We can recommend several steps to determine the culprit. To start the search, follow the recommended steps below.

Step 1: Force Reboot the device

If this is the first time you experience this kind of problem, the device might be experiencing some kind of a system crash and it won’t respond when you press the power button. It happens when there is a software problem that affects your many of the services running in the background.

The very first thing that you should do is to simply turn off the device, when the device is completely off, do this: press and hold the Power Key and Volume up key for about 10 seconds, then release both keys. If the device will boot up normally, then try charging it and observe the device if there’s an indication that it is actually charging.

Step 2: Check the charger / cable

It is very important to check the device’s charger or cable if there are any damages or breaks of some sort. Like for example, if the cable got stretched out too much, there’s a possibility that the wires inside the cable are broken. Or it might be the charger itself, the one that is plugged into the wall socket, that has problem. You can try using your charger with other devices that is using the same kind of port and observe if they are charging, if they are then your charger has no problem at all.

Step 3: Try using a different charger

You can use another charger if there’s an extra or you can borrow the same kind of charger from others. By using a different charger you can easily determine if the problem is with the phone or the charger itself. If possible, you can also use the wireless charger because it does not have any cable connect to your device. If the device is charging using the wireless charger, then, at least, we know the phone is still capable of charging just not with a wired one.

Step 4: Check your phone’s charging port

To check your device charging port, you can try using a flashlight or go outside your house for brighter surrounding and look for something that is possibly causing the issue like molds, dust, or other materials. You can clear it using absorbent materials like cotton for moist or thin stick like toothpick for hard materials.

Once your done checking the port, you can try charging it again and observe the device for indication that it is charging. To know if it is charging, the battery level will be moving or if the device is turned off the default charging logo will be seen on the screen.

Just in case if the recommended troubleshooting steps above did not resolve the issue, bring the device to your local Samsung service center. The device might be experiencing a hardware issue and the charger port is needed to be replaced or you need a new charger.

Fix your Galaxy S7 that is charging very slow

Problem: Hi! I have a Samsung Galaxy S7 for several months now but I have taken care of it and it actually still looks like brand new. It was never dropped and I never used it underwater despite the fact that it is water resistant. However, in the last couple of days, it’s taking so long to charge its battery unlike before that it only needs a couple of hours to fully charge it. I have already tried leaving it for 5 hours and the battery is nowhere near 100% as it stayed in 69%. I noticed, however, that the battery goes down even when it’s plugged in. Can this be fixed?

Troubleshooting: Slow charging issue is one of the most common problems that Samsung users are always complaining about. There are several possibilities that the issue occurs on your phone as it might be caused by a firmware glitch, crashing third-party app, corrupt system update or even an incompatible charger. However, to narrow down the possibilities there are troubleshooting procedures that you can perform on your device to help you determine and fix the problem.

Step 1: Check the Power adapter and USB cable of the device

One of the main reasons that the Galaxy S7 is charging slowly is because the power adapter might be defective. So you need to verify that first, you can try charging your phone and wait if the notification message saying “Fast Charging is enabled”. If the message is not showing on the screen, and the phone device is still charging very slowly, then the power adapter may be defective.

However, there might also be a problem in the USB cable that makes your device charging abnormally. Another possibility is that the cable cannot carry the exact amount of electricity from the power supply and that’s the reason the device is charging slowly. You try using another USB cable to see if the device actually charges normally.

Step 2: Clean-up the charging port of the device

If the Power adapter and the USB cable are  fine, there is a possibility that the charging port of the phone is defective, corroded or something is blocking it. So, the best thing that you should do is to try checking the charging port debris, lint, dust and other corrosive materials. If there is, then try to clean it up and try charging again after doing so. If the device is still not charging properly, then try the next step.

Step 3: Boot your phone on Safe mode

Third-party apps might also the reason that the issue is happening on your phone. There are reports saying that to solve the issue you must close all apps running in the background because the more apps are running the faster the battery drains. So, in this situation booting your phone on Safe mode is the best thing to do.

This procedure will temporarily disable all third-party apps installed on your phone and only the pre-installed apps will run by default during boot up. To enable this mode, follow the steps below:

  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.

However, while in this mode try to connect your device to the charger and observe if the problem is solved. If not, jump to the next procedure.

Step 4: Delete the system cache and try charging your phone again

This procedure is very effective especially after you did a firmware update on your Galaxy S7. One of the factors that the device is charging slowly it’s because the caches might have been corrupted. So, the next thing to do to try to fix the problem is to delete the cache stored on your device.

  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.

Now, after wiping the cache partition try charging your phone again and observe if the issue is still happening. If it’s still not fixed, perform the next procedure.

Step 5: Perform a Master reset on your phone

Since, you already performed some of the ways that will help you resolve the problem on your Galaxy S7 but none of them helped, then doing a reset is your last resort. But before doing the procedure make sure to backup all your important files because all of them will be deleted. To do the reset, follow these steps.

  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 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.

Should this procedure fail to solve the problem, then it’s time to try using a different charger or bring your device to the store and have it checked.

Relevant Galaxy S7 charging questions

Question: My Galaxy S7’s screen is blank so I thought it just ran out of battery. When I charge it, it doesn’t respond. How can I bring it back to life?

Answer: There’s no guarantee you can fix the problem as everything depends on how bad the problem is and what caused it. If it was caused by liquid or physical damage, most likely you need a tech’s help to determine if the phone can still be repaired. However, if the problem occurred without apparent reason, then it’s more likely just a system crash. You can fix it by simply pressing and holding the Volume Down and the Power keys together for 10 seconds. Given that the phone has enough battery, it should reboot. If it doesn’t, then you may also try using the troubleshooting procedures above.

Question: My Galaxy S7 is no longer fast charging, why is that?

Answer: Fast charging feature has some requirements like the screen should be turned off, the phone shouldn’t heat up, etc. But there’s one thing you can do that can ensure to make your device charge fast or enjoy the fast charging feature–turn it off while charging. I understand you may still want to use your phone while charging but if you really want the fast charging feature to work, then turn it off.

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