Solutions
Enable the Auto Power On setting.
Windows
Click Printer and Option Information on the printer driver's Maintenance tab. Enable the Auto Power On setting.
Mac OS
Select System Preferences from the Apple menu > Printers & Scanners (or Print & Scan, Print & Fax), and then select the printer. Click Options & Supplies > Utility > Open Printer Utility, and then click Printer Settings. Enable the Auto Power On setting.
When connecting using the USB cable, make sure you connect the USB cable securely to the printer and the computer.
When connecting over a network, check the lights on the printer to make sure that the printer is properly connected to a network.