There is a config backup function in OBi Expert or via the local interface, but both require the unit to be powered on.
After you get your new OBi202 configured, take a backup. If you need a restore in the future, just import the backup with OBi Expert. Backups don't contain passwords, so it's not a totally clean restore.
Via local interface:
System Management -> Device Update
Under Backup Configuration click Use OBi Version then click Backup
Select Save from the pop-up
Via Portal
From Dashboard click the Gear Icon
Click OBi Expert Configuration
Click Backup Config to OBi Expert
Select Save from the pop-up
The best you can do now with a dead OBi202 is Copy and Paste from the OBi Expert config screens.