Running Netware 6.5 on a Dell Poweredge 1800. Twice today users have been
unable to access the server, and the screen is blank when I try to down
it. (Using a KVM to share server's screen with two other machines). Only
solution - after discussion with colleagues - is to power down and then
restart server. Problem recurred after 2 to 3 hours.

Where do I go next? I understand ther are the logs which I can use to
diagnose the problem - where are they and what should I do with them?