Hello all, this is my first time installing Ubuntu and second time installing Linux so I am pretty much a total newb, forgive my newby-ness.

One of my friends recently gave me his old PowerPC G5. I have been trying unsuccessfully for about three days now to install Ubuntu 12.04 LTS on it.
I have reformatted it and managed to work out most of the bugs in it but there is one I cannot seem to fix, and that is the screen: when I start the machine, it gets to yaboot then the monitor displays "Input out of range" before I can even see the Ubuntu Logo (As soon as I should start seeing things.)

I have done some research and found out display problems are pretty common with the G5. I then was lead to try typing in
"Linux video=TV-1:d" in the yaboot prompt. When I did I was pleased to see everything was normal except one thing, about one half of the screen is not being displayed!!! Does anybody know some commands I could type in to fix this?

Computer Exact Specs:

Dual liquid cooled 2.3 GHz PowerPC 970FX G5s
NVIDIA GeForce 6800 Ultra DDL
2.5 Gigabytes of PC3200 DDR SDRAM
250 Gigabyte 7200 RPM harddrive