Default [Q] Android TV box wont boot after new firmware

Hey guys, I've got a new cs918 (It worked and connected great to my tv when I got it) and I've flashed it successfully to the Hybrid firmware ( http://forum.xda-developers.com/show....php?t=2395195 ).
The device now will power up (red light on the back and blue on start button) but it wont show any signal on any tv I plug it in to.
What can I do?
Model - CS918
Processer - RK3188T Quad-core Cortex A9 1.4GHz
Memory-2GB DDR3
GPU-Quad-core Mali-400

Thank you very much!