Xperia Z ultra display turns on continuously when fully charged

[robinp7720]

I have owned this for for little over a month now and for that time, when the device was fully charged the screen would turn on. Once the screen time out or manualy pressing the power button turns the display off, the display would instantly turn back on again!

[_alexdon_]

Try settings-apps-all-smart connect,clear data. Check how it is.

[robinp7720]

Already tried that, did it again and still, didnt change anything. 

[Thommo]

Do you have Daydream enabled?

[robinp7720]

No, I don't.

[Thommo]

Try a App preferences reset - Open Settings then tap the 3 dots then Reset app preferences then reboot and test

[robinp7720]

Nope, still the same problem. Factory reset too didnt help

[_alexdon_]

You may need to perform a software repair using PC Companion.The process will erase all internal memory.You might need to charge your device for about 1-2 hours before so the device has at least 60% battery.

Make sure the device is not connected to computer or laptop and turned off (sometimes you have to press power button and volume up until the device vibrates 3 times or on some devices you have to press the small button near the SIM tray or on the back of the device).

Open PC companion->support zone->phone/tablet software update->repair my phone/tablet blue highlighted.Follow the steps given,do not connect your phone until prompted to press volume down while plugging USB cable. If PC companion does not start the repair process, you might need to run it in compatibility mode with Windows 7 (in some cases XP).

[robinp7720]

Done that already, didnt help

[_alexdon_]

Are you on a specific network? It might be something from them. Or your device could be faulty.