[Q] Stuck on Unlock Bootloader Screen topic

I tried to flash the system.img to my VZW Dev Ed and now when I go to boot I am stuck on the logo screen that talks about the unlocked bootloader. Nothing I do will let me power down or get into fastboot or recovery. Without being able to take the battery out, I am pretty clueless on how to get this thing into fastboot so I can reflash.

Any suggestions?

I tried holding the power button and all that does is shut off the screen and next time I touch a button it goes back to getting stuck on the logo screen.