Yup, if you recovery flashed an older firmware over 4.3, insta-brick!
To know for sure plug into the computer and open device manager. If you see QHSUSB_DLOAD, its bricked and your only hope of fixing for free is the debrick thread as serio22 said.
While we are all wondering when Google will decide to officially release … more
19 Aug 2014
By Tomek Kondrat
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?