Galaxy S6 screen has yellow tint, screen remains black, won’t turn on, other issues

Today’s #GalaxyS6 troubleshooting article deals with some screen problems. As usual, the cases mentioned in this post are taken from letters we received from some members of our community. We hope that the solutions we provide here today will help not only the ones mentioned below but others who may be experiencing similar issues.

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: Galaxy S6 screen has yellow tint, wifi keeps showing “Authentication Error Occurred”

Hi. I’m messaging you on behalf of my mum! I previously had a Galaxy S6 and I had no problems at all with it. When I got a new phone I gave her my S6 since I didn’t have any problems with it myself. Anyway I performed a simple factory reset and gave it to her. Within a couple of hours I noticed her phone had a yellow tint to it. However I tried to sort this problem out by downloading an app and changing the colour balance on it! But that means whenever she closes all apps the colour of the phone screen will change back to yellow!

Also I have another, more severe problem. The S6 will not connect to the WiFi at all, at first it would connect to the WiFi and stay connected for a matter of seconds and then go back to mobile data. So I performed a reboot and this meant that the phone wouldn’t connect to the WiFi at all. It just keeps saying “Authentication Error Occurred”. I hope you can get back in touch with me with a solution to these problems! Thank you. — James

Solution: Hi James. Below are the troubleshooting steps that you can do for each of your issues.

Disable Blue Light Filter

Some Samsung devices are equipped with a feature called Blue Light Filter to minimize eye strain. Blue light is not entirely bad but the longer your eyes is exposed to it, the faster fatigue settles in. Since a human eye can exert more effort in focusing when exposed to short-wavelength, high energy blue light, it’s recommended that you reduce the amount of digital eye strain by minimizing exposure to it. Samsung did this by introducing Blue Light Filter. It works by changing the intensity of screen brightness and reducing the amount of blue light emitted by the screen. By turning on Blue light filter, the screen appears to dim and yellowish in color.

At this time, we can’t confirm if Blue Light Filter is available for Galaxy S6 devices as our own Galaxy S6 is out of order (and we can’t get a hand on any available S6). We can confirm though that Galaxy S7 and S8 device has this feature. To check if your S6 has Blue Light Filter feature, follow these steps:

  1. Open Settings.
  2. Tap Display.
  3. Turn off Blue light filter.

If there’s no Blue light filter in an S6, you can achieve the same effect by installing a third party app like Twilight from the Play Store.

Return all software settings back to factory defaults

We don’t know the full history of your device so there’s no way for us to tell you exactly what’s going on. Your mom may have installed a bad third party app that causes interference with the operating system, or the phone may had been physically impacted after you gave it to her. In a situation like this, we highly recommend that you set a set a benchmark by returning everything to defaults. This is the most efficient way to identify possible reasons for the problem. Since you already know how to factory reset the device, we will no longer provide the steps. Just make sure to back your mom’s files (photos, videos, etc) before doing it.

Once you’ve factory reset the S6, be sure to observe how wifi works. If your phone connects to wifi fine after a factory reset but the problem returns afterwards, it’s possible that one of the installed apps is causing it.

Im most cases, wifi authentication errors are caused by incorrect network credentials. Make sure that you know the username and password of the wifi network you’re connecting to to address it. If you’re connecting to wifi network that’s managed by someone else, be sure to talk to the network administrator to eliminate any network-related issue.

Problem 2: Galaxy S6 screen remains black, won’t turn on

Hi there. I dropped my phone and after that the screen just went black and the notification LED kept blinking. It went on for a day and the LED went off as well. I charged the phone and tried turning it on. I tried doing all the resets by pressing the different buttons, but no response at all. Like no LED, does not turn on, does not even charge. I opened it up and like disconnected the battery and connected it again, but no response.  Could you help me find out what the problem could be and what needs to be replaced? Thank you so much. And Happy new year 🙂 — Ahmad Umar

Solution: Hi Ahmad. If your phone was working normally before it was dropped, then the reason for the problem is obviously hardware malfunction. We are not in a position to know what this particular malfunction is. It can range from a bad battery, power management integrated circuit failure, or any other general hardware malfunction due to the unnecessary shock following the drop. In order to identify where the issue lies, a technician needs to check the device in person. This is because hardware repair is way more complicated than software troubleshooting. In a lot of cases, amateur repair attempts often led to problems than solutions. It is for this reason that our blog does not provide hardware troubleshooting and diagnostics. If you want to perform do-it-yourself repair, you can consult other sources.

Problem 3: Galaxy S6 screen flickers when connected to wifi

I’ve had an S6 for almost 2 years, and I have issues with WiFi connections and glitchy screens. Starting since October, my phone screen won’t turn on, despite functions still working. For example, my morning alarms will go off, but there’s no visual that appears on the screen, just the noise of my alarm going off. My screen will flash when I try to turn it on with Home key or Power button. This issue happens most often when I’m connected to my home Wifi, and I notice that it doesn’t happen when I’m at under homes with private Wifi, or when I’m solely connected via data. I talked to some friends who work in the cell phone industry, and they told me that I either received a faulty device, or I’m having Wifi radio signal issues that are affecting my phone screen. My phone often will glitch right when I need to use it. I’ve tried Safe Mode, minimizing my app number, and restarting multiple times. I’ve only had the device for less than 2 years, and it hasn’t suffered any severe damage. I’m not sure if this is cell phone network specific, but I have Verizon, and since this summer, my phone will not connect with any public Wifi’s. Library, Starbucks, Airport, any offered public and free Wifi, my phone will recognize, and attempt to connect, but results in no Internet connection. This caused me severe difficulty when I traveled over the summer, and was unable to use basic apps like Google Maps that required the Internet. My main issue now is a faulty and glitchy screen, that glitches unexpectedly, but most commonly occurs when I’m connected to WiFi. — Monet Kumazawa

Solution: Hi Monet. With symptoms taken together, your problem is more likely an exception than the rule. In our years of fixing smartphone problems, it’s the first time that we encounter an issue like yours. By following a basic smartphone troubleshooting rule of sending the phone in for repair if all software troubleshooting won’t work, we can say that yours is most probably an unknown hardware issue.

In an Android environment, there are hundreds of thousands of things that can go wrong. Though developers try to do their best to minimize bugs, there will still be problems from time to time, depending on the unique circumstances in each device. If the screen only glitches when your phone is connected to wifi, there may be an unknown operating system glitch causing it. To fix the issue, you should try to either perform a factory reset or reflash the firmware. If any or both of them won’t help, you should send the phone in for repair.

For reference, these are the steps on how to factory reset your S6:

  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 Vol 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.

If you intend on reflashing the firmware by yourself, be sure to do more research about it first. Flashing is a risky procedure and can potentially brick the device if not done correctly. If it’s your first time to do it, consider letting a more experienced user do it for you.


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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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