Startup loop on lollipop?

[craftyrc]

Hi!

I have a Sony Xperia z1 compact that I recently updated to lollipop. I turn it off for periods up to 3 hours at a time in order to save battery. However, twice in the last two days, it has played the startup animation as per usual but when it was done, the screen would go black for a few moments and then the whole thing would start again. Sometimes (in no pattern) it would display a white settings icon with a losing bar below it. This process wouldn't stop until I held down power+volume up keys to force shut it down. It would only turn on of I plugged it into a wall to charge. It has happened twice in the last two days and has been exactly the same both times.
Please help!!!

[_alexdon_ · Accepted solution]

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 80% 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).