Quote Originally Posted by paul_adams777
I have just had some better success with

knoppix debug 2

It doesn't boot - there is a kernel panic reported, but it also doesn't clear the screen.
As much of the dump as I can see reports the following. (Delta times are omitted)
Code:
Call Trace:
 [<c010fbf0>] 0xc010fbf0
 [<c01106d7>] 0xc01106d7
 [<c0102a19>] 0xc0102a19
 [<c05ac739>] 0xc05ac739
Code:  Bad EIP value.
EIP: [<00002076>] SS:ESP 0068:c05a7f68
---[ end trace a7919e7f17c0a725 ]---
Kernel panic - not syncing: Attempted to kill the idle task!
------------[ cut here ]------------
WARNING: at kernel/smp.c:333 ()
Modules linked in:
Pid: 0, comm: swapper Tainted: G      D    2.6.28.4 #8
Call Trace:
Unfortunately, all this is on the end of about three pages of data that tear by in about one tenth of a second (I'm not kidding, I attempted to video it).

A bit of research on the 'net implies that interrupts were disabled at the time that the SMP test was done, which led to the kernel panic. Unfortunately, the unit has no serial ports, so I can't capture any more of the output.