I've been informed that the red DELL logo is actually a "feature" of the BIOS revision.  Apparently, there are no POST errors. BIOS is handing off to disk0 (PERC), and it would seem that the MBR is corrupt. Once my login to the DRAC is fixed, I'll try a PXE boot of a recovery image.
After rebooting, the R710 is not completing POST.  It is hanging just after displaying the DRAC configuration and "Press CTRL+E or wait 5 sec...". It does not respond to CTRL+E. It does respond to CTRL+ALT+DEL and I am able to enter the system BIOS setup, as well as the other BIOS for the SAS and PERC controllers. What's strange to me is that the Dell logo is being displayed in red instead of blue. Has anyone seen this before? I'm asking my HW folks to re-seat things in the morning. We'll see what they can find.
R710 Dell logo red instead of blue