android lollipop update crashes my xperia z2

[IvanIp]

I just trieded to update my phone using PC companion today, however, my phone did not work when the update started, it can now only have the strat up screen (with sony xperia logo) only, what should I do to tackle the problem.Mush appreciated if anyone could help

[Hampus]

I'm sorry to hear that.
It sounds like you need to perform a software repair on your phone via PC Companion:
http://support.sonymobile.com/global-en/tools/pc-companion/

In PC Companion you press start on Support Zone > Start on Update the phone/tablet software > Repair phone/tablet (the blue clickable link in the message) > Follow these steps without having your device connected to the PC.

Follow the instruction that appears in the program and do not connect your device until this guide tells you how to connect it.

Note that your phone should be completely off while doing this. You can hold the ON/OFF + volume up(+) button for 5-10 seconds to force a shutdown. Do this when your phone is not connected to any kind of power source.