Wait for the message to clear once the time out expires, and then:
•Enter the correct PIN to access any held jobs
•See your system support person if you need a password number to enter a specific printer feature, setting, or menu that is blocked from your use without the number.
Toner low
Try one or more of the following:
•Replace the print cartridge.
•Press 
to clear the message and continue printing.
Tray <x> Empty
Load paper in the tray to clear the message.
Tray <x> Low
Load paper in the specified tray to clear the message.
Tray <x> Missing
Insert the specified tray into the printer.
Unsupported disk
An unsupported printer hard disk has been installed. Remove the unsupported device, and then install a supported one.
Unsupported USB device, please remove
Remove the unrecognized USB device.
Unsupported USB hub, please remove
Remove the unrecognized USB hub.
USB/USB <x>
The printer is using a USB cable connection. The USB port is the active communication link.
USB drive removed
Try one or more of the following:
•Wait for the message to clear.
•Insert the flash drive.
Understanding printer messages
155