Unhappy [Q] Please Help

My hcl u1 got stock at boot logo it just shows hcl me, after searching a lot i found out way to install stock rom but "how do i power it off" i want to go to recovery and i know that i need to press volume up+power key but it is stuck at boot logo nothing is happening even after press the power key or any other combination of key it is just stuck there i have downloaded the stock rom for it but cant install just because i cannot turn it off please help me....