How to fix a Galaxy S8 Plus that won’t charge: screen stays black while charging

Hello Android fans! Today’s troubleshooting article deals with another common problem found on the #GalaxyS8Plus — won’t charge and screen won’t turn on. If you are one of the unlucky users to experience this issue, be sure to do our suggestions below.
Before we proceed, we want to remind you that 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.

Problem #1: How to fix Galaxy S8 Plus Black Screen issue: screen won’t turn on

Hello. I have Samsung Galaxy S8 Plus screen went completely black. I tried all of your troubleshooting steps — nothing. I purchased new LCD screen had a technician install it and same problem. I tried asking the tech what he thought. He was no help. was hoping you can give me some help. I put a lot of money already. Only thing is one day I was driving home from work and it was a hot day had phone on my lap. I looked at my phone and it said device was hot so I took case off and cooled it down. Then about a week and half later my screen went black. Other than that I took real good care of the phone.

Solution: Smartphones are very sophisticated and so troubleshooting them can be hard. It takes multiple components and a lot of software processes in the background to allow a screen to work. Assuming that the technician who replaced the screen for you did it properly but still the phone has the same problem, that’s a sign that there may be a deeper issue. We don’t have the full history of your device so there’s no way for us to tell where the problem lies. There may be an issue with the logic board that the technician can’t identify. The phone’s video processor or chip may be damaged or there may be a power-related problem that prevents the screen from turning back on. You should have let Samsung handled the repair so a trained technician can advise you if the phone can still be saved or not. Since Samsung repair is out of the question at this time, the only other thing that you can do is get a second opinion. Try to bring the device to another reputable independent service shop and see if they can help. For an issue like this, a technician needs to run a thorough hardware diagnostics. We can’t do that for you so there’s obviously nothing much that we can tell you.

Problem #2: How to fix a Galaxy S8 Plus that won’t charge: screen stays black while charging

Was reading an article on it, noticed phone was at 8% so I set it down to get charger but forgot about it until i heard “phone one disconnected” from my Bluetooth earpiece. I plugged it into the charger and just the circle with lightning bolt showed on the screen (no percentage) and then it disappeared. The light at the top did not come on and then even the circle did not show anymore. I plugged it into a different charger but nothing. When I plugged it into the original charger again, a blue line flickered across the screen a few times. It won’t charge or turn on. Have kept in an OtterBox and no moisture exposure ever.

Solution:  There’s a number of potential solutions that you can try in this case. It looks like the phone is not totally dead so there’s a fair chance that you may still be able to revive the device on your own.

Try a different original Samsung Galaxy S9 charger

We understand that you’ve already tried charging the device with a different one but you did not indicate whether it’s an original S9 charger or not. Since we’re dealing with a power issue, it’s imperative that you use Samsung-validated accessories only. Some third party charging cable may be incompatible or problematic. Be sure to use official ones only. If you can’t find one easily, try to borrow one from a friend or visit your local Samsung store.

Clean the charging port

Checking the charging port is another important troubleshooting that you can do in this situation. Sometimes, pocket lint, dirt, or foreign objects may get inside the port and block the cable from making good contact while charging. Be sure to check the charging port and clean it if necessary. Use canned air to blow away dirt or any objects inside. Try not to stick anything to avoid damaging the system.

Use wireless charger

Your Galaxy S8 Plus is wireless capable so using this capability to troubleshoot makes sense. If the problem has something to do with the charging port, your phone should still charge wirelessly without any problems. This should be a good temporary workaround while still figuring out for the best course of action.

Make sure that you use an official wireless charger for this phone model. Some third party wireless chargers may have different specifications so they may not charge your device properly at all.

Restart to safe mode

Safe Mode is a software environment used by technicians to check for possible third party app issues. You should only try it if your phone can manage to turn back on, or if it shows signs that it’s not totally dead. For instance, if the device still makes sounds, vibrates on restart, shows LED light when charging, or indicates that it still charging on the screen, there’s a chance that you may be able to boot it to safe mode.

Safe mode blocks third party apps. If your S8 Plus boots to safe mode but not on normal mode, that means you have a third party app issue.

To restart 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.

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.
  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 S9 is still problematic, repeat steps 1-4.

Boot to other modes

By other modes, we mean Recovery Mode and Download Mode. Either of them runs independently of Android. If your S8 boots fine to any of them, that suggests a possible Android Operating System issue. But like in Safe Mode procedure, you should only attempt to boot your phone to other modes if it’s totally dead. If it doesn’t turn on at all or won’t charge, don’t waste your time with any of these procedures.

How to boot a Galaxy S9 to Recovery Mode

  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 Bixby 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).

How to boot a Galaxy S9 to Download Mode

  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 Down key and the Bixby key, then press and hold the Power key.
  3. You’ll know if you’re on Download Mode when you see a screen that says “Downloading….”

If your phone boots to Recovery Mode only, you may be able to fix the problem with a factory reset or factory wipe.

Download Mode is where you flash or manually install stock or custom ROM. Flashing may be another way to fix a software issue apart from factory reset. Flashing is more risky though and is only recommended for advanced users. It can potentially brick the phone and cause more problems. Be sure to do research about it if you want to attempt it.

Get Samsung support

Should nothing work up to this point, your best option is send the phone in. The most likely reason for your problem is something deeper. It can be a logic board issue, or a damaged battery. You must let a qualified technician examine the device so you’ll be advised properly. If the phone is still under warranty, there’s a chance that Samsung may fix it for free. In most instances though, repair, especially those that involves parts replacement, is shouldered by a user.


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