After pulling everything apart, it was a faulty connection to a KVM via the USB port.   Thanks for the response.  The inside of the machine is now nice and clean.
I have a pe1900 that has been working just fine.  I shut it down before a storm in anticipation of a power failure, which did not occur (it is connected to a ups). Upon restarting, the system will show memory and processor configuration, and then hangs. I have re-seated the memory, removed the PERC5 cards and disconnected all peripherals. Any ideas as to the next diagnostic step.  Software diags won't work as it doesn't get to that point. I can't get to setup.
PowerEdge 1900 Hangs on Boot