I need your help note 5 wont turn on

After i downgrade my note 5 n920l my phone boot up normally but its keeps restarting it self until it was turn off completely and now i cant get into download mode or recovery mode and even the phone wont charge and i tried to plug it to the pc but nothing happened please help me

from xda-developers http://ift.tt/28WzOAU
via IFTTT