Please try to reset forced if it is not working try to racadm racreset hard command as below
The Dell RACADM (Remote Access Controller Admin) utility is a command-line tool that allows for remote or local management using the iDRAC. RACADM commands can be run remotely from a management station or locally on the managed system.
In all instances, only the iDRAC will reboot and will not reboot the server (will not affect the running OS). Please note that there are differences in the commands between iDRAC 7/8, and iDRAC 9. The commands for resetting the iDRAC include:
iDRAC 7/8: Reset - This will reboot the iDRAC without changing any iDRAC configuration settings
Ex: racadm racreset
Reset (forced) - Adding -f to any iDRAC command will force the command Ex: racadm racreset -f
Reset iDRAC to factory defaults - this will reset all changes back to factory, REMOVING user and network settings Ex: racadm racresetcfg