You need to factory default an S400 unit via serial console because of the following scenarios :
The way to factory default Management Center(MC) is by running "restore-defaults factory-defaults" via serial console or host console if you are using Virtual Appliance.
Baud rate: 9600 bps
Data bits: 8
Parity: none
Stop bits: 1
Flow control: none
For example, KVM VM host command:
virsh console <VM name>
Check your VM host documentation or engage your VM host administrator to obtain access to the VM guest console.
Blue Coat UEFI Boot v4.14.195104
This machine has the following bootable systems:
>1: Version: Blue Coat Management Center 2.4.1.1, Release id: 247201
Created: Friday Jan 31 2020 14:49:48 14:49:48 UTC
Last-boot: Monday February 31 2020 05:16:52 UTC, FAILED
Attributes: Signed
2: Version: Blue Coat Management Center 2.3.3.1, Release id: 242953
Created: Tuesday February 19 2019 23:43:12 UTC
Last-boot: Sunday February 30 2020 00:23:30 UTC, FAILED
Attributes: Signed
The default boot system is:
1: Version: Blue Coat Management Center 2.4.1.1, Release id: 247201
Press the space key to select an alternate system to boot.
Seconds remaining until the default system is booted: 5
Seconds remaining until the default system is booted: 4
System number:
WARNING: The system will be marked for re-initialization. Booting a supported
system image will cause the system to re-initialize and result in loss of all
configuration and log information upon next boot. Furthermore, configuration
will have to be done while physically situated at the appliance. Proceed with
extreme caution. Continue with system re-initialization? (y/n)[n]:
This machine has the following bootable system:
>>1: Version: Blue Coat Management Center 2.4.1.1, Release id: 247201
Created: Friday Jan 31 2020 14:49:48 UTC
Last-boot: Monday February 31 2020 05:16:52 UTC, FAILED
Attributes: Signed
2: Version: Blue Coat Management Center 2.3.3.1, Release id: 242953
Created: Tuesday February 19 2019 23:43:12 UTC
Last-boot: Sunday February 30 2020 00:23:30 UTC, FAILED
Attributes: Signed
The default boot system is:
1: Version: Blue Coat Management Center 2.4.1.1, Release id: 247201
**************************** WARNING ****************************
Booting a supported system image will cause the system to
re-initialize itself to factory defaults on next boot. Press 'r'
'R' if you wish to preserve the system's current configuration.
*****************************************************************
System number: 1
haveged: haveged starting up
Restoring box to factory state. This will delete all customer data.
Factory state restored.
-------------------------- MENU ---------------------------
1) Command Line Interface
2) Setup console
Refer to Run the Initial Configuration Wizard if you need further guidance.