I have a server system:

Asus cuv4x-d motherboard
dual pentium 3 cpu's
Adaptec 2100s scsi card with raid 1 setup(2x16gb drives)
I am trying to use Knoppix to back up the system but
The only way I can get knoppix to boot is by using "failsafe"

If I try to boot normally or with "knoppix 3" I get a blank screen.

If I use "debug" then I see that the boot process freezes at:

ENABLING IO-APIC IRQs.

I have tried booting with diferent options like "no scsi" "no apic" etc. to try and
determine what is causing the hangup. Nothing works I get a blank screen.

How can I troubleshoot this issue?