Dell we have a problem.
It has come to my attention that ALL DELL PE2850’s have a hardware issue. It seems the dudes at Dell really messed up some firmware updates. If you are not running BIOS A06 and BMC 1.68 or higher download Dell’s Server Update Utility 5.1.1. (http://support.us.dell.com/support/downloads/format.aspx?releaseid=R136532) or later (I have only tested 5.1.1 though). Get 5.2 here http://support.us.dell.com/support/downloads/format.aspx?releaseid=R146351
So what happens if you are running the bad version? CPU IERR EO7F0 on every CPU in the machine at the same time. And then you get the famous Dell amber flashing light. Every OS locks up without processors, no really they do. If you call Dell Support (which I have done), you get greeted by a tech that says “Hi, welcome to Dell support. Please update your firmware and BIOS.”. DOH!