Josh, I have found the solution to my problem. I performed a reset of the iDrac controller, and after this retried the FW upgrade from the OS. This time the upgrade was successfull and the server powered on by itself. Alfter checking the FW version from OMSa i could verify the Firmware is nog up-to-date Thanks for your help. Kind regards, Tom  
Hello,  I'm trying to udate the FW of a power supply of a poweredge 720xd server, but he update keeps failing I tried to do the update from WIndows 2012 R2 using update package : Power_Firmware_838YW_WN64_07.09.50_A02.EXE The package runs succesfull, but the at the rebot the server just justs down and does noet restart (Waited 30 minutes). Powering on the server using the iDRAC works From the lyfecycle log
SUP0538: Unable to update Emerson 750W PSU (PN: 79RDR), 07.09.50, A02.