Urgent pls help i have a rooted mi4i ,in supersu a message came for update su binary

Urgent pls help i have a rooted mi4i ,in supersu a message came for update su binary and reboot in twrp some information as i gave update ,the phone got switched off and its not switching on...... Even after pressing power switch for 3 mins just the mi symbol comes and gets off.pls help.

from xda-developers http://ift.tt/1pHwzEk
via IFTTT