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Galaxy S6 Power Sharing message keeps popping up, fast charging not working, other issues

Hello everyone! Welcome to another post #GalaxyS6 issues and solutions. In this post are 6 more problems submitted to our mailbag questionnaire during the past few days. We hope that the solutions we provide here will not only help users mention in this article but also others who may have similar experiences.

Below are the specific topics we are covering in this material:

  1. Galaxy S6 Power Sharing message keeps popping up
  2. Galaxy S6 won’t boot normally after a system update
  3. Galaxy S6 fast charging not working
  4. Galaxy S6 screen not responding | Galaxy S6 black screen issue
  5. Galaxy S6 Active reboots on its own when it’s not connected to charger or when battery level is low
  6. Galaxy S6 screen turns black and a small “x” appears in the corner

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, or you can install our free app from Google Play Store.

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: Galaxy S6 Power Sharing message keeps popping up

To start off, I have had my phone for over a year now and not had any problems with it in any way. However, this all started yesterday when I saw it come up with a pop up of device power sharing or something along those lines and told me to download an app. This was new and I wasn’t going to do it right away without first being told what it is. My device wouldn’t charge at my girlfriend’s house using either one of two chargers which both usually worked fine. When on my way home I used a portable charger and it charged a bit (about 3-4%) before stopping and not charging anymore.

When I got home, I used my keyboard passthrough to charge it (Corsair Strafe) and it charged fine so I wasn’t sure whether it was a problem with the portable charger or the lead. I then went to charge it over night using an official Samsung charger but it wouldn’t charge. I turned my wifi off and battery down so it would survive and my alarms would still go off in the morning. It didn’t. I then tried to charge it on the bus (they feature USB ports used for device charging) but it wouldn’t charge and is now charging again on a Mac at my College. So it seems to be a case of my device only charging on computers. I have tried both hard reseting and safe mode but nothing seems to work and I’m not sure why. Please help! — Daniel

Solution: Hi Daniel.  We’ve encountered Power Sharing problems with older Samsung Galaxy devices before so we think that your phone may be getting this message: “Power Sharing: You must download the app in order to control the amount of power shared. If you connect your device to another device with the Samsung Power Sharing Cable EP-SG900 without the app, the entire battery amount will be transferred to the other device. Connect to Samsung Apps and download the application.”

The message comes from a legitimate Samsung app, Power Sharing, but Samsung is yet to issue an official fix for the problem like yours. Even at this time, we are, frankly, still at a loss on what causes this issue to occur. We think it has something to do with a specific firmware version but we don’t know what that is either. If factory reset or master reset did not change anything at all, we suggest that you try to manually install older stock firmware. Flashing stock firmware varies by device, so make sure that you use a correct guide for your phone model to prevent bricking your phone. You also want to make sure that you use the correct firmware version. Due to space limitation for every article, we can’t post the step-by-step guide here. Please use Google to search for it instead.

Problem #2: Galaxy S6 won’t boot normally after a system update

My S6 just installed an update yesterday and was working fine after. All of the sudden it shut off and was unresponsive. It eventually restarted and worked for a couple minutes only to shut off again. This time it would not turn back on. I plugged it in and the red light came on that it was charging and the screen came on with the battery charging symbol and then the battery with 0%. The phone had a 70% battery when it shut off. I tried doing a soft reset, but nothing happened. It did finally start in recovery mode, but it had “installing system update” with the Android guy. After a few seconds the Android guy died with an exclamation triangle above. It then entered recovery mode and I’ve tried wiping the cache and a factory reset. but now it is stuck booting in recovery mode. If I unplug it, it will turn off and not come on. Plugged it back in, and it will go to the install system update, then dead Android, then back to recovery mode. — Steve

Solution: Hi Steve. As we’ve been repeating in almost all our posts in the past, there’s little to nothing that can be done for an issue like this. While you may be able to attribute the reason for the trouble probably to a bad system update, fixing the problem itself can be difficult. The usual solutions that you should try if problems occur after installing a system update are limited to wiping the cache partition, factory reset, and flashing of stock ROM. Since there’s nothing that can be done when you try to boot the phone to Recovery mode, your only way out may be flashing via Odin. Like what we tell, Daniel above, flashing can potentially lead to more problems than solutions if not done properly so make to follow a good guide on how to do it.

Problem #3: Galaxy S6 fast charging not working

Hi there! I am having an issue when I am charging my phone. At first I thought it was my cable/plug but have bought a new one and tried others and the problem still occurs. When I plug it in it starts to charge and then will flicker on and off of charge very quickly. Sometimes it will charge a little bit but then go off and as I said sometimes it will flicker on and off quite rapidly. I tend to unplug it when it’s doing that because I don’t want to destroy the battery completely.

Also the fast charge isn’t working anymore so I have this problem and it will take about 7 hours to fully charge the phone. Is this a problem with the software or do I need to take it to the shop to replace the battery/charging port? Thank you! — Samantha

Solution: Hi Samantha. A lot of charging problems like what you’re experiencing are caused by bad hardware. Hardware problems in this case can be due to damaged charging port, bad battery, or some unknown hardware issue. Because the phone’s battery can’t be removed easily, the only thing that you can do on your end is to check if there’s a damaged pin insider the charging port. To do that, you want to use some form of magnification like the one you usually see in many electronic repair shops. This tool is necessary to let you see the inside of the port clearly. If you look closely inside the charging port, you’ll be able to distinguish the pins. If one of them appears out of place or bent, that may be the reason why charging is erratic. Before you decide to send the phone to a repair shop, we suggest that you do some software troubleshooting first to see if they will fix the issue.

The first software solution that you want to do is wiping the cache partition. This will force the phone to delete the old system cache and replace it with a new, updated one. Sometimes, system or app updates can corrupt the system cache. Deleting the old one may fix some problems. Here’s how it’s done:

  1. Turn off the device.
  2. Press and hold the following three buttons at the same time: Volume Up key, Home key, and Power key.
  3. When the phone vibrates, release the Power key but continue to press and hold the Volume Up key and the Home key.
  4. When the Android System Recovery screen appears, release the Volume Up and Home keys.
  5. Press the Volume Down key to highlight ‘wipe cache partition.’
  6. Press the Power key to select.
  7. When the wipe cache partition is complete, ‘Reboot system now’ is highlighted.
  8. Press the Power key to restart the device.

Should the issue continue after wiping the cache partition, your next move would be to observe how charging works when safe mode is enabled. Safe mode  blocks third party apps and services so if your phone charges fine, that’s proof that an app is to blame. Here are the steps on how to boot your phone to safe mode:

  1. Press and hold the Volume Down and Power keys for 20 to 30 seconds.
  2. Once you see the Samsung logo, release the Power key immediately but continue pressing the Volume Down key.
  3. Your phone should continue booting up and you will be prompted to unlock your phone as usual.
  4. You will know if the phone successfully booted in safe mode if the text “Safe mode” is displayed at the lower-left corner of the screen.

Finally, if nothing works, don’t hesitate to wipe the phone and reset all software settings to default with the help of factory reset. This process will erase all user data such as photos, videos, contacts, etc., so make sure that you back your files up before you proceed. To factory reset your phone, follow these steps:

  1. Turn off your Samsung Galaxy S6 Edge.
  2. Press and hold the Volume Up, Home and Power keys together.
  3. When the device powers on and displays ‘Power on logo’, release all keys and the Android icon will appear on the screen.
  4. Wait until the Android Recovery Screen appears after about 30 seconds.
  5. Using the Volume Down key, highlight the option, ‘wipe data/factory reset’ and press the Power key to select it.
  6. Press the Volume Down button again until the option ‘Yes — delete all user data’ is highlighted and then press the Power key to select it.
  7. After the reset is complete, highlight ‘Reboot system now’ and hit the Power key to restart the phone.

Problem #4: Galaxy S6 screen not responding | Galaxy S6 black screen issue

Hello. My Samsung Galaxy S6 is not functioning. The screen is black, the far left LED light at the top of the screen is white (not blue). I had it charging via cable for an hour, then unplugged it to see. And nothing, still a black screen. Then i plugged it back in. The charging batter signal comes on for 15 seconds and says 0%. I then tried charging it via my wireless charger and the same thing occurs, all while the white LED light does not shut off. I tried the master reset. But for some reason a green screen pops up with a message about installing custom OS. I pressed volume down button but this does nothing. The screen prompt stays up/unresponsive until the screen fades to black after 30 seconds and stays black with a white LED continuously on (not blinking but constant light) — SE

Solution: Hi SE. The usual LED colors for a Samsung Galaxy S6 and S6 edge includes blue, red, and green only. These colors are for standard notifications and functions of the phone. Below are their meaning:

Blue

– Pulsing: the device is turning on or off.

– Blinking: there is an unread notification (missed call, message etc) or during voice recording.

Red

– Glowing: connected to a charger and charging.

– Blinking: connected to a charger but not charging, or when low on battery.

Green

-Glowing: connected to a charger and fully charged.

-Blinking: fully charged.

Other non-standard colors may be shown if you’ve installed a third party app or custom firmware that changes LED color. For example, Whatsapp app can show white LED color.

If you rooted the device or installed custom firmware/ROM on it, there’s high likelihood that such software is causing the boot up problem. Make sure to contact the developer of such software to see if they’ve encountered this problem before. Otherwise, try to see if you can boot the phone to different modes so you can try a different approach to solution. For reference, below are the steps on how to boot your phone to other modes:

Boot in Recovery mode:

  1. Charge the phone for at least 30 minutes.
  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. You can either wipe the cache partition or do a factory reset when in this mode.

Boot in Download Mode:

  1. Charge the phone for at least 30 minutes.
  2. Press and then hold the Home and Volume DOWN 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 DOWN keys.
  4. Wait until the Download screen appears.
  5. If you can boot the phone in download mode but not in other modes, that means that your only way out may be to flash a stock or custom firmware.
  6. Use Google to look for a guide on how to do it.

Boot in safe mode:

  1. Charge the phone for at least 30 minutes.
  2. Press and hold the Power button.
  3. Once the ‘Samsung Galaxy S7’ logo appears, release the Power key and immediately press and hold the Volume Down button.
  4. Continue holding the button until the phone finishes rebooting.
  5. Once you see the text “Safe mode” at the bottom left corner of the screen, release the Volume Down button.
  6. The only difference of safe mode from normal mode is that the former prevents third party apps from running. If you can boot the phone in safe mode but not in normal mode, uninstall all apps until the issue (that prevents you from booting normally) is eliminated.

Problem #5: Galaxy S6 Active reboots on its own when it’s not connected to charger or when battery level is low

My Galaxy S6 Active has been being weird the last few days. It is acting like the battery is being pulled from it randomly, but when it reboots [well, tries to], it goes through the Galaxy screen and the SAMSUNG screen fine, but when it gets to the AT&T logo screen it lags and the shuts off again, starting a boot loop. When it is on the charger it works fine, restarting with no lag or anything, never shuts off. I have factory reset the device, cleared the cache. It seems to work fine after a full charge, but it is shutting off anywhere between 5-15% battery usually. — Jrclego1998

Solution: Hi Jrclego1998. Based on your short problem description, the issue may lie on the battery itself. Either the (a) operating system no longer detects the actual battery level accurately, or (b) the battery itself has lost capacity to hold a charge due wear and tear or damage. The only suggestion we have for you is to recalibrate the battery to fix the former. If battery recalibration won’t work, you must find a way to have the battery checked or replaced. Below are the steps on how to calibrate the battery again:

  1. Use the phone by playing games or doing tasks to hasten power discharge, until the phone turns itself off.
  2. Turn the phone on again and let it turn itself off.
  3. Charge the phone without turning it back on.
  4. Wait until the battery says it fully charged to 100%
  5. Unplug the charger and turn the phone on.
  6. If the phone says it’s not 100% anymore, turn it off, plug the charger back in and wait until 100% charge is reached.
  7. Unplug the charger the turn the phone on again.
  8. Use the phone until you drain the battery down to 0.
  9. Repeat the cycle once.

Problem #6: Galaxy S6 screen turns black and a small “x” appears in the corner

When I try to charge my phone it sometimes comes up a black screen and vibrates and a small white “x” appears at corner of screen. And it looks like the screen tilts then this disappears and my phone is no longer charging. This is really annoying. I have tried wiping my phone 3 different times. I have disabled Gear VR app on my phone (only because I have researched this online and says could be related to this app even though I don’t use it). I have tried using in Safe Mode which worked for couple of hours, then same problem again. Was wondering if you could help. — Dionne

Solution: Hi Dionne. As we say above, safe mode blocks third party apps and services. If your phone went back to charging normally when it was on safe mode but reverted back to the same issue after you boot the phone back to normal, that’s a sign that one of the installed apps is causing this trouble. You must do further troubleshooting by identifying the culprit through individual removal of apps. Make sure that you observe the phone after every uninstallation to see the difference. This is the only way to pinpoint the problematic app.

On the other hand, if you’re saying that the phone charges normally initially after booting to safe mode, but suffers the same problem a few hours later (with the phone still in safe mode), that’s a different story altogether. You must then try factory reset to see if that will make fix the problem.

 


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