Put a rubber band around your power and volume button to force off and when it finaly responds
Use flashtool or sony updater service to fix your ion unless you have a unlocked bootloader then use flashtool
Any questions just ask
Sent from my LT26i using XDA Premium 4 mobile app
Hit thanks if it helped, and if your unsure about something, Think... think some more, then post your question.
Sony Xperia S
Sony Xperia Z1 (not exactly mine yet :/)
Nokia 3310 (the tank)