Thank you very much for trying to help! It turned out that the monitor itself was defective.  I had never seen a monitor go bad in that manner before.  Maybe this information will help keep someone else from wasting a lot of time troubleshooting. PS. I replaced the HD that was blinking green/amber - that was obviously a separate issue.
PowerEdge T610 boots up with white screen. No text and no BIOS access, just a blank white screen. I do not know how to troubleshoot this and cannot find any info regarding a blank white screen. BTW, HDD 2 is blinking green/amber.
Blank white screen