I have two Dell PowerEdge 2900 servers with Netware 6.5 SP8 (eDir 8.8 sp4). Randomly they with hang with a blank black screen. There is no option except to hard reboot. Nothing ever shows in abend.log. Tried running with only certian apps running, but can't pin it down to one app.

Anyone have any suggestions to at least find out what is carusing the hang up?