Ok since
@sawdoctor mentioned me.
I'll pop in and drop u a link to the bootloader I, used to upgrade mine when I did.
Keep in mind this is going to trip Knox to 01 ok... That is if you're even worried about that Knox crap.
Go here for bootloader files>>>>
http://forum.xda-developers.com/showpost.php?p=53841081&postcount=2
Now if you do upgrade the bootloader you'll be able to charge while the phone is off, and you can use the stock kernel.
One other thing Doc told you to do. Was never flash a kernel right after flashing any rom, big no no. Probably why u ended up with the black screen. At least wait 10 mins for everything to settle into the device, since you just flashed a new Rom. Then you proceed to flashing your kernel of choice found
here.
Good luck,
Bajan