bricked or screen broken?

[zeren]

Hello everyone!

I have a problem with my xperia U 

A few days ago it suddently turned off and won't start up again.

When I press power, it vibrates one time but it does not turn on anymore.

When I connect to the wall charger it gets red led which after a while turns green.

Both fastbood and flashmode work.

Pressing Power and Vol+, nothing happens.

The computer does not recognize the phone as Xperia U, but it sees it as somc flash device.

I have tried to update the software through Companion a few times, the update seems successful, but nothing changes.

I have tried to flash the orginal firmware also through Flashtool many times, but even if succeeds, phone does not turn on.

Any ideas, before I send it to sony center?

Thank you!

UPDATE! 13/12/2014

My phone is back from Sony Center (after only 10 days!): it was a hardware problem, my screen was changed and now it works better than before!

Thank you so much 

[Hampus]

Hi and welcome to the community! Since you're new please be sure that you have checked out our Discussion guidelines.

Hard to say what the problem could be. I think you would do best by visiting nearest service center to have your phone examined by a technician.You can contact your local support team for further information about nearest service center and/or how to proceed with this in the best possible way:
http://www.sonymobile.com/global-en/support/contact-us/contact-info/