Xperia SP switching off randomly

[j4jayashree]

My Xperia SP is getting switched off automatically and taking lots of time to switch-on. When am trying to switch it on the phone is vibrating but not booting.   again after some time when am trying to switching it on its getting on!

Pls tell me what is the problem????!!! I use 360 security anti virus, free RAM is almost 130MB battery usually last 2days.

I did not plug in my phone over night to charge through a wall socket.

[Uliwooly]

repair your phone with PCC and do NOT install that antivirus app 

Update Service (SUS)

PC Companion (PCC)

Bridge (for Mac)

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355

[zagna2]

Propably hardware issue. I had the same and I went to service center. Try the above repair solution and if it's not work you must go to Sony service center.