"Rockusb" means something happens inside your device (ie: is not completely dead). RK3066 can be flashed with RkBatchTool (or RkToolkit if you're in Linux). Try to see if your computer recognizes the device in its current state:
http://domoticx.com/firmware-tool-ro...htool-windows/
If that happens you'll need to contact Boyue so they can provide you a flashable image. That should be enough to return your device back to live.