I have a client that has a Dell PowerEdge 840 running SBS 2003. They called me out saying the server wouldn't turn on. The server will power on and goes through the post process. After POST it just goes to a black screen. If I press F8 right away it will bring up startup options but goes to a black screen eventually. When I choose Safe Mode it goes through the process and locks. The last line displayed is loading acpitabl.dat. Also when the screen goes black the monitor does have the sync light that it is receiving a signal and the keyboard seems to lock.