How To Fix The Samsung Galaxy M40 Screen Flickering Issue

The #Samsung #Galaxy #M40 is the latest mid-range Android smartphone model to hit the market just  this June 2019. It has a plastic body with a 6.3 inch PLS TFT screen having a resolution of 1080 x 2340 pixels. It uses a triple rear camera system and a single 16MP selfie camera at the front. Under the hood is a Snapdragon 675 octa core processor which is paired with 6GB of RAM. Although this is a solid performing device there are instances when certain issues can occur which we will be addressing today. In this latest installment of our troubleshooting series we will tackle the Samsung Galaxy M40 screen flickering issue.

If you own a Galaxy M50 or any other Android device for that matter then feel free to contact us using this form. We will be more than happy to assist you with any concerns that you may have with your device. This is a free service we are offering with no strings attached. We however ask that when you do contact us try to be as detailed as possible so that an accurate assessment can be made and the correct solution can be given.

How To Fix The Samsung Galaxy M40 Screen Flickering Issue

Before you troubleshoot this particular problem it’s best to make sure that your phone is running on the latest software version. If an update is available then I suggest that you download and install it first. This will minimize the possibility of the problem being caused by an outdated software version.

Once your phone has the latest software update installed then proceed with the steps listed below.

Perform a soft reset

The first thing that you will need to do in this case is to refresh the phone software by doing a soft reset. This will eliminate any corrupt temporary data stored in the phone which could be causing the problem.

  • Press and hold the Power and Volume down key for up to 45 seconds.
  • Wait as the device restarts.

Check if the Samsung Galaxy M40 screen flickering issue still occurs.

Start the phone in Safe Mode

There are instances when an app you downloaded can cause this particular issue. If the app has a few bugs which the developer hasn’t ironed out yet then there’s a chance that the screen will flicker. To check if this is the case you will have to start the phone in Safe Mode as only the pre-installed apps are allowed to run in this mode.

  • Turn the device off.
  • Press and hold the Power key past the screen with the device name.
  • When ‘SAMSUNG’ appears on the screen, release the Power key.
  • Immediately after releasing the Power key, press and hold the Volume down key.
  • Continue to hold the Volume down key until the device finishes restarting.
  • Safe mode will display in the bottom left corner of the screen.
  • Release the Volume down key when you see ‘Safe Mode’.

If the screen flickering does not occur in this mode then the problem could be caused by an app you downloaded. Find out what app this is and uninstall it.

Finding the particular app is a trial and error method. Start by uninstalling the most recent app you downloaded before the problem occurred then check if the screen still flickers. Repeat this step until the issue will not occur anymore after uninstalling a particular app. This last app is most likely the cause of the problem.

Wipe the cache partition

Sometimes the problem can be caused by a  corrupted system cached data. It’s therefore a good idea to delete this data as the phone will just rebuild this data when it starts again.

  • Turn off the phone.
  • Press and hold the Volume Up key and the Home key, then press and hold the Power key.
  • When the device logo screen displays, release only the Power key
  • When the Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  • Press the Volume down key several times key to highlight ‘wipe cache partition.’
  • Press the Power key to select.
  • Press the Volume down key to highlight ‘yes’ and press the Power key to select.
  • When the wipe cache partition is complete, ‘Reboot system now’ is highlighted.
  • Press the Power key to restart the device.

Check if the Samsung Galaxy M40 screen flickering issue still occurs.

Perform a factory reset

One last troubleshooting step to consider is a factory reset. This will bring your phone back to its original factory condition. Take note that your phone data will be deleted in the process so make sure to backup your phone data before proceeding.

  • Turn off the phone.
  • Press and hold the Volume Up key and the Home key, then press and hold the Power key.
  • When the device logo screen displays, release only the Power key
  • When the Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  • Press the Volume down key several times key to highlight ‘wipe data / factory reset.’
  • Press Power button to select.
  • Press the Volume down key until ‘Yes — delete all user data’ is highlighted.
  • Press Power button to select and start the master reset.
  • When the master reset is complete, ‘Reboot system now’ is highlighted.
  • Press the Power key to restart the device.
  • With no apps installed in the phone, try to check if the issue still occurs.

If the above steps doesn’t fix the problem then you will need to bring the phone to a service center and have it checked as this is most likely caused by a faulty hardware component already, possibly by a defective display assembly.

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