Actually, you can do an equivalent to a BCM50 level 2 reset on a 400 rel 4.0.
Go to backup/restore under administration. Select restore here. In the drop down menu box just above the restore button, select factory defaults. Click the restore button. Click OK on the window that opens up. It warns you that this action will replace the current backup file on the BCM. Provided that's not a problem for you, just click ok on that. Another window opens up with a bunch of components with all checkboxes checked. If you want to restore everyting to factory, just leave them all checked and hit restore. It acts just like any other restore. Let it finish and when it reboots you're done. Factory defaults! Just be advised that this action will turn off DHCP for the OA&M port so you will have to manually configure your PC with a 10.10.11.x address to log back into it. Once in. just enable DHCP for the LAN2 interface again.
If you just want to restore certain components, just uncheck the boxes you don't want reset and do the same thing.
Works like a charm.