Why are printers suddenly unable to print?
It’s possible that the Samba *.tdb files, used by Samba to store print queue info which a native NT print server would store in the “Registry”, got corrupted when the power failed. The tdbtool may be able to verify that. tdbtool is a Samba developer tool and not compiled or installed by default. Either you have a *.tdb backup, created with tdbbackup, or you need to re-install all queues…