Nexus 7 2nd gen stuck at unlock bootloader screen, how can I move past this?

[AC Question]

My tablet is stuck at google screen and when I use Nexus Root Toolkit to unlock FastLoader, it shows up unlock bootloader screen and after selecting Yes it gets stuck.
Nothing happens. I have tried lots of available steps but still unable to get past the bootloader screen. Please help.

 

[B. Diddy]

I think this is a duplicate--see this thread: http://forums.androidcentral.com/go...unlock-bootloader-mode-how-can-i-get-out.html