xperia u getting on and off

[ghallusahb]

My Xperia Is Getting On and Off
When i connect it to PC Companion it isn't connecting and showing no device found
Tell Me How Should I Connect It To PC Companion to repair my software..???

[ghallusahb]

Also it gets Hanged EveryTime and Get On Off.....
Please Reply

[Uliwooly]

Have you unlocked the bootloader?

[gilvert]

problem to download pc mac.and update.