Samsung Note 2 Bricked

I wanted to start up my note 2. So i tried charging it. What happens is The screen either stops at the boot logo or at the charging circle. I tried reflashing the ROM and it says cannot mount /system, cannot mount /data etc etc. I tried flashing the ROM through sdcard, adb, OTG cable. Nothing worked. I tried formatting all data and even tried to change format of system, data, cache but it failed.