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Samsung Galaxy S7 no longer charges normally after Android Nougat update [Troubleshooting Guide]

  • Read and understand why a high-end device like the Samsung Galaxy S7 running Android Nougat can no longer charge normally after the firmware update. Also learn how to troubleshoot your phone when your device is experiencing charging-related issues.

The normal operation is that when you plug in the charger, which is plugged into the wall outlet, the phone will immediately detect electricity flowing through its circuits and the charging process begins. While it may seem like this process only involves the charger and the battery, there’s another thing that’s needed to make it possible–the firmware. It allows electricity to flow through the circuits through the power IC and it’s the one responsible in making sure the phone doesn’t overcharge.

There are times when the firmware encounters issues especially during updates, they may cause the phone not to charge properly especially if the processes necessary in making sure the device charges properly crash. At least, it’s one of the possibilities and there are a bunch of other possibilities out there. But in this post, I will try to go after the firmware first before trying to rule out other possibilities since the problem started shortly after an update.

Now, before we jump into our troubleshooting, if you have other issues with your phone, try to visit our troubleshooting page for we have already addressed a lot of issues sent by our readers. All the solutions we suggested were based on problems we’ve received so there’s a high probability that they’re same problems with yours. So, try to find issues that are similar with what you currently have and use the solutions we suggested. If they don’t work or if you need further assistance, fill up our Android issues questionnaire and hit submit to contact us.

Galaxy S7 no longer charges shortly after Android Nougat is installed

Problem: I don’t understand why this problem happened but shortly after the Nougat update got installed, my Galaxy S7 failed to charge. Normally it would display the charging icon whenever I plug it in but it’s not doing that now. In other words, it just wouldn’t charge nor respond whenever I charge it. I know it’s not normal but I don’t know what the problem is let alone how to fix it that’s why I’m asking for your help. Do you guys know how to fix this?

Troubleshooting: I understand how frustrating this problem could be especially if you’re already running out of battery. Some users wait until the battery is down to just 5% before charging their devices and when it doesn’t charge, that’s when things get really messy especially when you’re expecting an important call from someone or gaming with your favorite game. A phone should always charge when plugged in and having a device that doesn’t even react when plugged in is really something to worry about. So, when this thing happens to you, here’s what you should do…

Step 1: If the phone is frozen, force reboot it. More often, a phone that’s about to run out of battery may freeze for some reason. When this happens and when the battery runs out, it may freeze leaving an impression that it won’t charge as it doesn’t respond when plugged in. So, this step is the first thing you have to do before you proceed with your troubleshooting. There have already been a lot of our readers who contacted us just to say thank you that a method as simple as this have helped them.

To force reboot your device, press and hold the Volume Down button and the Power key together for 15 seconds and then try to charge it again to see if it’s successful. If the device still won’t charge, then move on to the next step.

Step 2: Check the charger and cable to know if it has some issues

The easiest way to know if the problem is with the charger is to use a different one and see if the phone charges, however, in case you don’t have a spare charger, you should check the port for debris, lint, corrosion and even bent pins. In case you find debris or lint, you can easily fish it out using a pair of tweezers or a blast of compressed air will blow them out of the port. As for the corrosion, use a Q tip with alcohol to clean out the pins and if you can find a bent or misaligned pin or two, you may use a pair of tweezers to straighten them out.

However, if you cannot find any of these things and if you have a computer or a laptop, I suggest you connect your phone to it just to know if it responds. While computers don’t don’t give out the same amount of current, the voltage should be about 5 volts and should be enough to make the phone respond when you plug it in. So, as long as your device doesn’t have issues with its circuits and assuming the problem is with the charger, then it should recognize being connected to a computer and the latter may also detect a device has been connected via the USB port. But if neither your phone nor computer recognizes being connected to each other, it means no connection is established and it could mean that it’s a cable problem.

Therefore, at this point in your troubleshooting, if you have other USB cables you could use, I suggest you do so just to know if you can remedy the problem by using a different cable. If that’s not possible, then you should physically check it for same things you were looking for when you checked your charger’s port. Moreover, you should also do the same to your phone’s charging port and if you can’t find anything in the ports and if the cable looks fine, then move on to the next step.

Step 3: If ever possible, use a wireless charger

No, I’m not letting you go around the problem without dealing with it. I’m suggesting you use a wireless charger, if possible, just to know if the phone is still capable of charging it’s battery. At this stage, it’s imperative that you know that your device is still capable of allowing electricity flow through its circuits and the battery of holding a charge. If it does respond to the wireless charger, then it’s about time you bought a new charger to replace your old one.

On the other hand, if the phone still won’t respond when you place it over the wireless charging pad, then there’s really something wrong with your device but we still have to rule out the possibility that the new firmware is causing the problem. The only complication is when your device doesn’t have enough power and won’t turn on.

Step 4: If possible, attempt to boot your phone in safe mode

Assuming your device still has enough power, say for instance around 15% battery, you can still try to troubleshoot the firmware and this must be the first thing you should do. This will rule out the possibility that one or some of your apps is causing the problem and in this case, you have to uninstall suspected apps one-by-one to pinpoint which one is the culprit. This is how you boot your phone in safe mode:

  1. Press and hold the Power key.
  2. When Samsung Galaxy S7 logo appears, release the Power key and immediately hold the volume down key.
  3. Continue holding the Volume Down key until it finishes its rebooting.
  4. When “Safe mode” appears on the screen immediately release the Volume Down key.

If the phone boots up in this mode successfully, try charging it to know if it responds and if so, try to uninstall suspected apps, otherwise, proceed to the next step.

Step 5: Since it’s a firmware issue, try wiping the cache partition / reset

The system cache can easily get corrupted especially during firmware updates and when this happens, a lot of things could happen and while we don’t know for sure if it’s really the cache that has issues, when it comes to firmware problems, it’s the rule of thumb to go after them first before going after the data. That being said, try wiping the cache partition:

  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 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 wiping the cache partition. Once completed, highlight ‘Reboot system now’ and press the Power key.
  9. The phone will now reboot longer than usual.

Once the phone successfully reboots, try charging the device again and if the problem still persists, it’s best you just proceed with master reset, however, you will lose all your files and data so it’s your call if you want to continue even without a guarantee the problem will be fixed.

  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. NOTE: It doesn’t matter how long you press and hold the Home and Volume Up keys, it won’t affect the phone but by the time you press and hold the Power key, that’s when the phone starts to respond.
  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. NOTE: The “Installing system update” message may show on the screen for several seconds before displaying the Android system recovery menu. This is just the first phase of the entire process.
  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.

If the problem still persists after these procedures or if you can’t continue with the wiping of the cache partition or reset due to insufficiency with battery, then bringing your phone back to the store is your last resort.

Galaxy S7 cannot reach 100% when charging after Nougat update

Problem: I just noticed that my phone can not reach 100% when charging, it only replenishes its battery around 92% or so but it never did reach 100% ever since I downloaded that update a few days back. Have you guys encountered this problem before and do you know how to fix it? I need your help on this, my phone is a Galaxy S7 which is almost a year old since I bought it in April last year. I just want it to work like it was before especially to fully charge its battery because 8% deficit seems very alarming. Thanks.

Troubleshooting: Something must be draining the battery of your phone really fast while charging. We don’t know, at this point, what the cause of the problem is so we have to continue observing your device. I suggest your restart your phone in safe mode and try charging to see if it charges to 100%. If it still can’t reach 100% even in safe mode, then it might be a problem with the firmware or the hardware. However, if it reaches 100%, then find the app that might have something to do with power saving or something that “optimizes” the battery. I suggest you try clearing their cache and data and if that won’t work, then uninstall them.

  1. From Home screen, tap App icon.
  2. Tap Settings.
  3. Tap Applications and Application manager.
  4. Swipe to ALL tab.
  5. Find and tap suspected app.
  6. Touch the Force Close button first.
  7. Tap storage.
  8. Tap Clear cache and Clear data, Delete.

I know for a fact this is easier said than done, so if you don’t know which app is causing the problem, it’s better to just backup your data and then do the factory reset.

  1. From the Home screen, tap the Apps icon.
  2. Find and tap Settings and then touch Backup and reset.
  3. Tap Factory data reset and touch Reset device.
  4. If you have screen lock feature turned on, enter your password or PIN.
  5. Touch Continue.
  6. Tap Delete all to confirm your action.

I would also suggest you turn your phone off and try charging it to 100% percent, if the problem still persists, then it must be a problem with the hardware but try to do the master reset before deciding in bringing it to the store for checkup and/or repair.

  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. NOTE: It doesn’t matter how long you press and hold the Home and Volume Up keys, it won’t affect the phone but by the time you press and hold the Power key, that’s when the phone starts to respond.
  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. NOTE: The “Installing system update” message may show on the screen for several seconds before displaying the Android system recovery menu. This is just the first phase of the entire process.
  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.  

Galaxy S7 charges very slowly after updating it to Nougat

Problem: One of the things I like this phone is its capability to fully charge its battery for more than just an hour. However, this past few days, it’s taking over 4 hours to fully charge its battery and I don’t understand why it just started to act like this. My phone is a Galaxy S7 which I purchased brand new and it’s only just a few months old so it’s really disappointing to know it’s not charging properly anymore. What should I do?

Troubleshooting: The Galaxy S7 has a fast charging feature so when it starts to charge very slow, you should immediately verify if it’s really a “slow” charging issue or “normal” charging because you may have been used to the fast charging feature. But here are a couple of things you may try to get answers to your questions…

Boot up in safe mode and charge the phone – this is to know if the phone is capable of replenishing its battery when all third-party apps are temporarily disabled. If so, then the problem is caused by one or some of your downloaded apps. Find that app and uninstall it to fix the problem. It is also possible that there are a lot of apps running in the background. The charger may be pushing electricity into the battery at the same pace but some apps are draining it quicker. In this case, however, you can enjoy fast charging when in this mode.

Turn your phone off and charge it – to be able to enjoy the fast charging feature, your phone must meet all the requirements; it must use the original charger with adaptive fast charging feature, the screen should not be lit while charging, the device should not heat up during charge, etc. To make sure all these requirements are met, it’s better that you simply turn your phone off while charging. If the phone charges fast while turned off, then one of the requirements wasn’t met, however, I suggest you also backup your files and data and then reset your device.

If the problem persists, then bring your phone to the shop and have it fixed.

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16 Comments

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  1. Excellent Clearing the cache worked for me. it was cycling on and off charging every 10 to 20 seconds and very annoying. Now its back. I must admit the fast charging is what i like most about the phone.

    Thanks

  2. Galexy S7 would only charge up to 6% . Used step 1 (Reboot) It seems to have solved the problem.
    Thanks.

  3. I have this phone since last November. This month, after the Nougat update, it started to malfunction. The day before yesterday it started rebooting every minute or so. I wiped the cache and it helped, for a while. Then it woudn’t charge at all. I tried everything, including factory reset. Then it died, wouldn’t respond at all when plugged to the charger. After a night like that, it came back, took a full charge and worked fine for another day. Last night it stopped charging, battery went dead and it dosen’t respond to the charger once again. It is pretty much bricked! A total shame for such a high end device. =/

  4. My phone updated about a week ago and I am constantly ready to throw it in the road now. It will only charge 1 out of 5 attempts. Tried 4 different cords and adaptors. Tried charging while off, while in safe mode. Have wiped cache partition several times. Once i finally get it to actually take a charge it will either work fine for a day, or the battery will drain at a ridiculous rate. I can literally watch it drop from 100% to 72% in about 4 minutes, while not using it for anything except watching it piss me off.

  5. This just started to happen to me too. Some times after using a regular charger the fast charger will connect then disconnect. after a few tried it finally starts charging but it is not fast charging. this is so annoying. this will be my first and last samsung phone

  6. @Dave

    The fast charging option is still available. Go to Settings and select ‘Device maintenance’. Now select ‘Battery’ on the lower left. Next, tap the three dots on the top right of screen and select ‘Advanced Settings’. Now you will find the option to enable or disable ‘Fast cable charging’.

  7. I have a Note 5 and I just had the update on April 20th, and ever since the nougat update my phone takes up to almost 3 hours to charge contrary to the usual which only takes about an average of 1.3 hours. Also when charging it indicates Cable charging and I have to unplug and plug again before the usual Fast Charging appears.

  8. Same issue. I pay a TON of money every month for cell phone service and this phone is pissing me off. I have always been an android user and I am about to go iPhone because of the ridiculous pile of issues with charging and fast dying batteries on Androids. I left HTC after 12 years for Samsung over their battery issues and now I am fed up with Samsung issues. I have to charge my phone 3 times a day (before the update) and now after update I can’t charge my phone unless on the wireless disk which takes FOREVER. I need my phone for my job. This is seriously affecting my productivity.

  9. I have been using S7 edge for almost an year. It did have little issues (like dark lines on screen battery bulge and unresponsive touch) during the year which ended up in service center thrice. Recently when i was using the phone, the battery of the phone completely got drained. I used a charger for charging it got to 1% and i turned my phone on. it got rebooted and turned off, and after that it is not charging at all. please let me know how to fix it?

  10. The charging software on the S7 has always been a bit sketchy. Fast charging in particular gives no reason why it won’t fast charge, so people think something is wrong, when it is simply that the program does not want to overheat the battery by charging while apps are discharging the battery at the same time.

    The Nougat update has a different problem. When trying to use the fast charger, the software starts, stops, and restarts repeatedly, with a beep at each cycle. This is not a hardware problem either with the phone or the Samsung charger. This is simply a case of poorly written software and it’s been that way for several releases.

    I’ve gotten around the problem by powering down the S7 and waiting a few minutes before plugging in the Samsung charger. The charging system works well this way. It also works well when using my verizon branded car charger (no fast charging capability).

    Samsung needs to focus on the charging software and get it right, and include indicators for the end user as to what it is doing and why.

  11. My Note 4 just updated, and now won’t charge at all. I’ve tried a cache wipe, but nothing. I’m furious.

  12. I’m also having the same problem as Caitlin and Matt. I’ve tested different cords as well as wall adapters, and the only thing that seems to affect it is whether or not it’s fast charging, be it that the adapter doesn’t support it or that you turn fast charging off. (Though it also doesn’t happen with wireless fast charging.) For now I think I’ll just turn fast charging off, but nevertheless the issue is annoying. I did try wiping the cache, but I’m not really willing to do a factory reset when I don’t even know if that will fix it.

  13. My phone stopped charging after the software update. I went through the steps to “wipe cache partition” as instructed above, and it fixed my phone! If anyone’s having the same issue, I recommend performing the “wipe cache partition”.

  14. I’m having the same problem as Matt – but I’ve tested on a few different Samsung cords at different locations and experience the charging cycle problem every time. Has anyone found a fix?

  15. Since updating to Nougat last night whenever I plug in my fast charger, it’s having issues keeping a charge going. Constantly cycling from ‘charging’ to ‘fast charging’ then not charging, repeatedly. It might be that it doesn’t like the cord, but the cord itself is “for use with Samsung approved charging adapters,” so I believe it’s Samsung brand itself.

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