Display keep turning on/off automatically

[#1]

My new Xperia Ray that I baught a week ago keeps turning on/off by its own without any user activity.  What is the problem and what is causing it so, it did not do this when i unboxed it.  Number two it gets heated when i watch a video or play a game or during a call.  Any suggestion and remedies?

[Nabeel]

Hi most probably its due to third party app

Display keeps turning on.

Screen Blinks every 10 secs after locking in Xperia Neo V

Fail to Save Default Actions

However its good to perform a software repair..

__________________________________________________________________________

Backup everything as it will erase all data on phone (sms, contacts,apps)

Update/Repair your phone via PCC or SUS

PCC (PC COMPANION) – Repair your software with this .First do the setup without connecting your mobile to pc.(only connect when you are asked to).

Do it as follow >> PCC > SUPPORT ZONE> SOFTWARE UPDATE> REPAIR SOFTWARE (written with blue)  

PC Companion http://www.sonymobile.com/global-en/tools/pc-companion/

___________________________________________________________________________

Regarding heating, its normal ...but if it gets too hot to hold it comfortably means it needs to be taken care of at service center