How to fix a Galaxy J7 fast charging stopped working issue (no longer doing fast charging)

Hello Android users and fans! Today’s troubleshooting article talks about fixing some common issues reported on the #GalaxyJ7. In this episode, we address fast charging issue as well as other related ones. We hope you’ll find this post helpful.

Problem #1: How to fix a Galaxy J7 fast charging stopped working issue

The issue seems to be VERY slow charging and the fast charging not working. I know that it is my phone’s fault and not that of the charger or charging outlet as my brother (who has an J7 also) has tried and works perfectly fine on his phone. Even when I turn on fast charging it does regular charging. One difference I noticed between mine and my brothers phone while charging, is that mine says ‘USB connected’ rather than ‘cable charging.’ Currently it takes 7 and a half hours to charge from 10% to 100%! Please help me understand what the problem is and how to resolve this issue.

Solution: A common reason why fast charging can cease to work out of the blue is charging defect. This can be due to broken metal connector or pin in the port itself. This happens if you plug in an incompatible charging cable or if you’re not careful when plugging it in and out. Moving the charging cable sideways while already plugged in can also damage the charging port system sometimes.

Check the charging port

In some other rare cases, presence of pocket lint or foreign debris may block the charging cable and cause insufficient contact. This can also create a situation similar to what you’re experiencing right now. If possible, try to inspect the charging port with a magnifying tool and check if there’s anything inside that does not belong there. If the port is dirty or if there’s something that should not be there to begin with, try using a can of compressed air to remove the foreign object. Try not to stick anything inside to avoid damaging otherwise intact system.


Sometimes, a short can happen in the charging port causing the bottom part to be overheated. This can lead to more serious problems and can potentially damage the charging port for good. If you had cases of overheating in the past, this may be the reason why the charging port is damaged at this time.

Factory reset

To know whether or not the problem can be fixed on your level, we suggest that you wipe the phone to return all software information back to their defaults. This will help you check if software is to blame or not.

To factory reset your J7:

  1. Turn off the device. This is important. If you can’t turn it off, you’ll never be able to boot to Recovery Mode. If you are not able to shut the device off regularly via the Power button, wait until the phone’s battery is drained. Then, charge the phone for 30 minutes before booting to Recovery Mode.
  2. Press and hold the Volume Up key and the Home key, then press and hold the Power key.
  3. When the green Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  4. Press the Volume down key several times to highlight ‘wipe data / factory reset’.
  5. Press Power button to select.
  6. Press the Volume down key until ‘Yes — delete all user data’ is highlighted.
  7. Press Power button to select and start the master reset.
  8. When the master reset is complete, ‘Reboot system now’ is highlighted.
  9. Press the Power key to restart the device.
  10. Charge the phone and check if fast charging works (make sure fast charging is enabled under Settings).


Should the problem remain even right after a factory reset, you can assume there’s a problem with the charging port. Unfortunately, the only way to permanently fix it is by replacing the damaged part. Make sure that you let Samsung do the repair for you.

Problem #2: What to do if Galaxy J7 won’t turn off, status bar is missing, or Home Screen stays black

My Samsung Galaxy J7 is not showing the status bar, the home page background has become black (even after changing it to something else), and it will not let me turn it off. Tapping the power button puts the phone to sleep as usual. Holding the power button does nothing. I tried a soft reset (power + volume down for 12 sec) which restarted the phone without any debug/safe mode options. When restarted this way, the phone displayed the normal starting logos followed by a “android is starting” message with a status bar. Then it opened to the home screen with the same issues as before.

Solution: These minor annoyances may be caused by an operating system bug or a bad app. To fix them, make sure to follow our suggestions below.

Disconnect the battery

For a Galaxy J7, which has a detachable battery, you can also try to remove the battery to clear the RAM and refresh the system. Some bugs only run temporarily and may stop after a restart. Make sure that you disconnect the battery for 10 seconds before plugging it back in. If that won’t work, proceed to the next troubleshooting step below.

Boot to safe mode

It’s possible that you may have installed a bad third party app before and not causing the problem. To check if this is the case, you want to boot the device back to safe mode and observe what happens. In this mode, all third party apps will be suspended, only allowing pre-installed ones to runs. If the concerns you mention are not present on safe mode, that means you have a third party app issue.

To boot your J7 to safe mode:

  1. Turn the device off.
  2. Press and hold the Power key past the model name screen.
  3. When “SAMSUNG” appears on the screen, release the Power key.
  4. Immediately after releasing the Power key, press and hold the Volume down key.
  5. Continue to hold the Volume down key until the device finishes restarting.
  6. Safe mode will display in the bottom left corner of the screen.
  7. Release the Volume down key when you see Safe Mode.
  8. Check for the problems.

To identify which of your apps is causing the trouble, you should boot the phone back to safe mode and follow these steps:

  1. Boot to safe mode.
  2. Check for the problem. If they continue to exist, proceed to the steps below.
  3. Once you’ve confirmed that a third party app is to blame, you can start uninstalling apps individually. We suggest that you begin with the most recent ones you added.
  4. After you uninstall an app, restart the phone to normal mode and check for the problem.
  5. If your J7 is still problematic, repeat steps 1-4.

Uninstall third party launchers

If you are using a non-official launcher app to change the looks of your user interface, we recommend that you erase it and see if that’s the one causing the problems. If you did not install any third party launcher at all, just skip this step entirely.

Wipe the phone

The cause of the problem is most likely software in nature so you may need to ultimately do a factory reset. Refer to the steps above on how to do it.

Problem #3: How to fix a Galaxy J7 that won’t charge or turn on

Hi. Recently my phone shut down while I was not using it and I couldn’t turn it on. I plugged it in, left it alone for a few hours, came back, and it booted up with full battery. That night, I plugged it in to charge before bed. The charger was being weird, the phone notified me that it stopped and started charging multiple times as I set it down, but when it was sat down it was charging. I left it to charge overnight and the next morning I tried to turn the phone on and it would not respond to anything. It seemed like there wasn’t a battery even in the phone. I’ve tried everything from holding the power button and the down volume button, the power and up volume, the down, home, and power button, up power and home button, to taking the battery out. Nothing has worked, and I don’t know what else to do. Thank you,  Isabel M Isabel M.

Solution: There may be a problem with the charging accessories you’re using. This can sometimes happen out of the blue. To check if that’s the case, try to charge your J7 with another USB cable and adapter (preferably, another official ones from Samsung Galaxy J7).

Battery issue

If the second set of charging cable and adapter won’t work, you may be right about the battery. Try to visit your local Samsung store and see if they can let you borrow a battery to check. If that’s not possible, try to get a brand new battery.

If you don’t want to waste money on a battery (in case there’s another reason for the problem), you can try to check it first using a multimeter. This won’t repair a dead battery but can be a helpful way to know before investing in a new one. You can check this website for exact steps on how to check the battery using a multimeter.


If there’s no battery issue at all, it’s possible that your phone may have suffered a fatal hardware failure or malfunction. At this point, you want to let a professional check the hardware. We highly recommend that you let Samsung do the repair.

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Harvey Hisona

Harvey is keen with mobile technology and loves writing about all things mobile. He is passionate in helping technology-challenged people by finding resolution to their issues. Contact me at Email

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