won't switch on, won't switch off

[pavlaki1]

Did a restart on the way to the airport and my XA1 has become permanently frozen on the white Xperia logo page. I can neither switch it on nor off. Trid plugging it in and nothing changed. Help!

[Uliwooly · Accepted solution]

@pavlaki

press and hold power & volume up for 10 seconds 

[pavlaki1]

Thanks. Will use that for future reference.

[Uliwooly]

Anytime