on 18-05-2021 10:30
on 18-05-2021 10:33
Try holding power and volume down for 30 secs or so until the phone vibrates.
on 18-05-2021 10:43
on 18-05-2021 11:52
on 18-05-2021 11:52
Sounds like you nee to contact Sont for repair advice then.
https://www.sony.co.uk/electronics/support/mobile-phones-tablets