It sounds like the iDRAC is not fully initializing. If you are unable to flash the firmware of the iDRAC and clearing NVRAM doesn't help then the only thing left to do is take the system to minimum to POST. If the iDRAC still fails to initialize properly with the system at minimum to POST then you will likely need to replace the iDRAC express. I don't think it is a component that you can order on this system as it is part of the default configuration, so you would likely need to replace the system board to replace the iDRAC express. Thanks
good day,  there is a problem with my LC I can't connect to it and the uefi boot isn't accessible so the repair packed can't be used. also when opening omsa there's no server info. I reset the drac but no changes is there a solution?  
LC r710