xperia ray top screen goes missing

[#1]

my xperia top screen(where you see battery, service network + more) goes missing sometime, during this if i get a call, it just rings and i cannot screen anything on phone, restart gets it back.

can any1 suggest me what should i do.

[Nabeel · Accepted solution]

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/

SUS ( Sony Update Service)  ... download and install it on pc and follow the on-screen instructions http://www-support-downloads.sonymobile.com/Software%20Downloads/Update_Service_Setup-2.11.12.5.exe

                   or

http://www.sonymobile.com/global-en/tools/update-service/

both the links are same