Hi,   It seems that you have done most of the troubleshooting that I can think of. Can you check if you can ping the iDRAC IP? If yes, you can Telnet to the IP to reset the iDRAC. This is a long shot, and since you have done hardware removal from the chassis slot, but could you try virtual reseat the blade via the CMC GUI (under the troubleshooting tab) or via the racadm command below: racadm serveraction –m server-n reseat –fnote: n = the slot number the blade is housed in If else fails on the above steps I pointed, then you should open up a case.
Recently an SD card failed and we lost redundancy on this esxi host, a replacement card was procured and system put in maintenance mode and evacuated.  I was logged in to the idrac at the time to verify which SD module needed replacement while the vmware admin powered the host from vcenter.  The system now hangs at boot and does not get beyond "booting idrac"   System was removed from chassis again, power button depressed for 30 seconds to discharge and reseated to no avail.  Also tried removing down to single "good" SD slot 1, no change.   The only other recommendation I've found is an old post referring to initiating a failover to the standby CMC in the chassis.  CMC log shows the blade insert/removal but the idrac does not boot and from "racadm getversion" it shows "server-10 idrac not ready" Anyone have any other tricks before we open a T&M case on this out of warranty box?
m630 blade stuck booting idrac/flashing green power