When the PC begins to boot up, do you see a screen like this? http://shots.osdir.com/slideshows/sl...se=167&slide=1. If so then you can type some codes to help it boot up. I would try the following:
Code:
knoppix vga=normal
Or
Code:
knoppix vga=normal screen=640x480 xvrefresh=60
**EDIT**
Try this one but I don't think it wil work.
Code:
knoppix fb640x480
You can also get command line console access by using the code:
Code:
knoppix 2 vga=normal
I hope this helps.
James