The printer can be configured to restart itself after a power failure, unattended, with the Power Failure Recovery Mode set.
Remove the power supply cable from the back of the printer.
Remove any attached printer interface cables.
The Power Failure Recovery Mode is only available on printers with a Printer Connectivity Module installed in the printer.
The Printer Connectivity Modules have a Power Failure Recovery jumper set to OFF. With the jumper set to ON, the printer will automatically Power ON when plugged into an active (ON) AC power source.