Xperia T - repeated failures

[pablolfc]

I have a Xperia T

I have had previous problems with the software (about 5 weeks ago) which after several attempts it finaly seemed to right itself after using the pc companion.

Today completely out of the Blue it started happening again. Shut down by itself (batt around 80%) an gets stuck in a loop when switch it on. It has on occasion made it as far as the home screen, but generally doesnt make it past the Sony screen. 

Ive tried the hard reset (power button an volume)

Ive also tried to connect it to pc to use companion, but when connecting to companion it wont register a connection unless its switched on, an it wont stay on.

Someone please give me a suggestion, other than send it to sony if possible an tonite?? (need it for work) 

thanks

[_alexdon_]

Charge it for 2 hours,force turn off (power button+volume up until the phone vibrates 3 times).After this,repair with SUS:

http://www.sonymobile.com/gb/tools/update-service/

[pablolfc]

ive done that

it powered all the way on, worked for about 5/10 minutes then returned back to how it was soon as it started updating apps 

[_alexdon_]

Stop by a sony service:

http://www.sonymobile.com/global-en/support/contact-us/

[pablolfc]

just an update really

Ive been an had the phone Flashed today at a phone shop. 

It worked fine on the original base software, but none of the apps would work due to software being out of date. 

The only update i have installed is the Sony Xperia - Jelly bean android

Since doing this it has returned to its prior state of repeating boot loops for a period, then completely shutting off an not being able to do anything with it