[Q] Galaxy note-Black screen of death

Hey guys I am using international Galaxy Note N7000.I switched from CM10.1 to official jelly bean 4.1 without wiping data and now that when the hold the power button I can hear the phone starting(sound) but I don't see any thing on the screen and even I see nothing when I hold hold the recovery mode keys,all I see is a black screen.Now my phone is bricked how can I unbrick?

Please help quickly.

Thank you!!