Phone Heats and hangs up

[arunsr96]

My m4 aqua heats up in normal usage and stutters and sometimes hangs up, shows only black screen, need to reboot to use again

[Hari1]

Its sign of Mobile that need of Service center suport.  They wil replace motherboard. 

[Phy]

repair the phone with Sony PC Companion
http://support.sonymobile.com/gb/tools/pc-companion/