Quote Originally Posted by james_steward
Direct connecting the keyboard didn't help.
In expert mode I got to loading which scsi modules and the keyboard was not working at that point
Even though it does not seem to me like the problem, I would leave the KVM switch out of the puzzle until I knew something. Nothing else in line with the ps2 plugs that you didn't mention, is there, like a digital joystick interface, or 3D Glasses interface, or the good old Cue Cat? Anything drawing power for the ps2 port could very well be the issue.

No alternate keyboard? Even an old marginal one? Or an alternate mouse, even one with a dirty rubber ball inside?

If you couldn't answer the scsi question, what was the last question that you did answer and what answer did you take?