FW port wasn't responding, tried to fix and now display's INSANELY messedup

My Lacie external wasn't responding at all on my G5, search a bunch of forums and how ti fix it and came up with this:
1° boot the mac in Open Firmware by holding [ Apple key - Option - O - F ] after the startup chime.
2° you'll get to a command prompt. the keyboard mapping will be QWERTY, so pay attention when you type the following :
RESET-NVRAM (enter)
RESET-ALL (enter)
3° Now the mac should restart itself and the port should function properly again.
Went in and tried it out, when my mac rebooted the picture display is now just completely out of whack, everything's black and white and super pixelated and really messed up. How can I fix this? I'm also thinking the instructions I used to try to fix my FireWire port may have been for a G4 so I don't know if i totally screwed myself. Anyone know how to A) get my computer back to normal and B) get my Lacie to read? PLEASE HELP THIS IS URGENT.
thanks.
b

HI-
Welcome to Discussions!
Your signature says that you use OS 10.6.
If so, you have a Mac Pro, not a G5.
Intel Mac Pro machines are quite different and should be posted in the Mac Pro forum.
Pending your reply, I'll ask to have this moved so that you don't need to repost.
Beyond this, have you restarted the machine again, to see if a second restart is normal?
After a normal restart, try a Safe Mode start.
Hold down the Shift key during boot to boot to Safe Mode.
This will allow you to check your display preference settings in case that is where the problem lies.

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