Black Screen w/ Cursor on UniBeast Yosemite USB Boot

[revlimiter]

Hi everyone,

I have successfully installed Yosemite in the past using UniBeast and the detailed instructions found here:
http://www.tonymacx86.com/yosemite-...-x-yosemite-any-supported-intel-based-pc.html

However, one day I turn on my computer to find it give a black screen w/ cursor on boot (looks like it gets stuck at the Chameleon Bootloader screen, it won't show anything else by pressing enter or trying to type, it just gives a flashing cursor).

So I have tried reinstalling Yosemite to my USB drive twice now. Both times I follow the Yosemite guide from scratch in detail, to install to the USB drive, and boot, and both times I get stuck at the boot from USB screen, with the very same black screen w/ flashing cursor.

Any idea what's going wrong here?
Thanks,

 

[revlimiter]

bump

Thank you

 

[revlimiter]

Video of it in action (sorry about the very crappy iPhone 4S quality):
https://www.youtube.com/watch?v=wo3I1dpBjT8

 

[revlimiter]

Video of it in action (sorry about the very crappy iPhone 4S quality):
https://www.youtube.com/watch?v=wo3I1dpBjT8

All I get is the "boot0: done_" message and then it's stuck on "-". I have tried reinstalling UniBeast and have also tried physically removing my GTX 480, but both provide the same screen on USB boot.

 

[revlimiter]

Bump - any ideas? Maybe it's just something simple in UEFI to adjust?

Thank you,