When you first power on a 5524, connected via the serial console, you are offered a setup wizard where you can enter the management IP/Net/Gateway and enter the admin password. HOWEVER, if you dont do this in 60 seconds, the wizard dissapears, and there seems to be no way to run it again - even if you reboot the box.
No commands work in the CLI, it just gives you this prompt:
If you type say enable, or login, it gives:
>login Unknown parameter May be one from the following list: debug help
So no commands seem to work.
The CLI reference guide does not seem to have any way to run the wizard, or to set the management port or admin passwords.
So by not responding in 60 secons after boot, the unit is bricked.