It is my experience the RLM is the same as having a serial cable plugged into the filers serial port. If the filer is dead and will not power on, the rlm access will not help. Get around this problem by asking a local 3rd party to connect a serial cable to a local machine and using Windows RDP or other remote control product to access the console session on this machine. This assumes the filer can be made to try and start by the 3rd party.
If the filer will power on and the RLM is correctly configured but DoT will not boot. You should be able to connect to the RLM and then connect to the filer system console. You should then be able to bounce the filer while the RLM continues to report what is happening. Interrupt boot process to access the special boot menu and run diagnostics. Either full system or just on the NVRAM system, just select from menu.
Hope it helps and good luck with the recovery.
Bren
NetApp Diag
http://now.netapp.com/NOW/knowledge/docs/hardware/NetApp/diag/html/ch1/booting.htm
NVRAM error codes
http://now.netapp.com/NOW/knowledge/docs/hardware/NetApp/diag/html/ch3/ch3a/nv7_env.htm