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    The Touchscreen Isn’t Working Properly

    There are a number of solutions you can try if your touchscreen is over-sensitive, acts on its own, is unresponsive, or has poor sensitivity.

    • The touchscreen’s performance may be affected by dirt, heat, or the use of device covers or screen protectors:
      • If you have applied a screen protector on your device, make sure that it is properly fitted and that there are no air bubbles, dust, or moisture under the screen protector.

      • Remove any protective case or cover from your device to verify it's not interfering with the touchscreen.

      • Wipe the screen with a clean, dry cloth to make sure your touchscreen is clean. Make sure your hands and fingers are clean and dry before using the touchscreen.

      • If the device gets too hot, the touch functionality may be affected. Let it cool off and then try using the touchscreen again.

    • Turn off your device and then turn it back on. By doing this, you turn off all running applications and free up memory, which sometimes automatically resolves the issue.

    • You can force your device to restart or shut down in situations where it stops responding or won't restart normally. No settings or personal data get deleted during a forced restart.


      To force the device to shut down

      Forcing Sony Xperia™ Z4 Tablet to shut down
      1. Remove the cover of the memory card slot.
      2. Using the tip of a pen or a similar object, press and hold down the OFF button until the device shuts down.


      Do not use overly sharp objects that could damage the OFF button.

      To Turn on the Device

      Turning on Sony Xperia™ Z4 Tablet

      1. Press and hold down the power key Icn sony key and power k90 until the screen flashes.
      2. Wait a while for the device to start.

    • If the problem occurs when your device is charging, make sure you are using an original Sony charger and a USB cable specifically intended for charging your device. Other chargers may have a negative impact on the functionality of the touchscreen.

    • If there is a memory card in your device, remove it and restart the device. If removing the memory card resolves the issue, your SD card may be damaged. In this case, you need to get a replacement SD card for your Xperia™ device.

    • Use safe mode to check if any downloaded applications are causing the problem. In safe mode, your device only starts with software and applications that were already installed when you purchased your device. If the device’s performance improves in safe mode, it’s likely one or more of your post-purchase downloaded applications are affecting the device negatively. You can exit safe mode and restart the device to uninstall the application or applications that you suspect are causing the problem. If the problem is recent and you're not sure which application is causing the problem, you can start by uninstalling the most recently downloaded application.


      To enable safe mode

      1. Turn off your device.
      2. Press and hold down the power key Icn sony key and power k90 until the device vibrates.
      3. When the Sony and Xperia™ logotypes appear, press and hold the Volume down key until Safe mode appears on the screen.


      To exit safe mode, restart the device.

      To Uninstall an Application from the Application Screen

      1. Touch and hold any area on the Application screen until the device vibrates. All applications that can be uninstalled are then indicated by Icn sony home uninstall.
      2. Select the application you want to uninstall, and then tap Delete.


      Some apps indicated by Icn sony home uninstall can only be disabled and not uninstalled. Disabling an app deletes all data, but the app can be enabled again from Settings > Apps.

    • Use the Xperia™ Diagnostics application to carry out a quick test to check the touchscreen functionality. Xperia™ Diagnostics can assess potential hardware or software issues on your Xperia™ device.


      To Run a Specific Diagnostic Test

      1. From your Home screen, tap Icn sony home apptray normal.
      2. Find and tap Settings > About phone > Diagnostics.
      3. Swipe to the TEST tab and select a test from the list.
      4. Follow the instructions and tap YES or NO to confirm if the feature works.
      5. Tap Done.

    • Update your device to ensure you have optimal performance and the latest enhancements. Read more about how to update and find the latest software version.

    • Use the Xperia™ Companion computer application to perform a software repair to reset your device. Note that all data is deleted from the internal storage of your device when you perform a software repair. Content you have saved on an external SD card, like photos, videos, and music, is not deleted.


      To Back up your Data Using a Computer

      1. Make sure Xperia™ Companion for Windows or Mac OS is installed on your PC or Mac®.
      2. Connect your device to the computer using a USB cable.
      3. Computer: Open the Xperia™ Companion software. After a few moments, the computer detects your device.
      4. Select Backup on the main screen.
      5. Follow the on-screen instructions to back up data from your device.

      To Repair the Device Software Using Xperia™ Companion


      Before performing a software repair, make sure you know your Google™ credentials. Depending on your security settings, you may need to enter them in order to start up the device after a software repair.

      1. Make sure that Xperia™ Companion for Windows or Mac OS is installed on your PC or Mac®.
      2. Open the Xperia™ Companion software on the computer and select Software repair on the screen.
      3. Follow the on-screen instructions to reinstall the software and complete the repair.

    • Check to see if the screen has been physically damaged in any way. If any damage has occurred, contact us.

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    Find your product
    On your Xperia™ device, go to Settings > About Phone/Tablet > Model number
    On your Xperia™ device, go to Settings > About Phone/Tablet > Model number