Share your experience!
Hi as of today my power button/lock button seems to have a mind of its own, if I press it it won't lock the screen but then suddenly ither the power off restart screen shot screen jumps on and off about 10 times then locks or the other way around anyone got any ideas how to fix this
Restart the device and check again, if that doesn't work, maybe repairing it with XC but it might be a hardware issue. By any chance, does the phone has a protective case?
Alternatives on How to backup Xperias
Hi @Tbeedles, I'm very sorry to hear about that. 
I agree with @uliwoolys recommendation, please try that first. Should it still persist after that, then I recommend that you get in touch with your Local support in order to have the device sent to an authorized service center.