Dell P1500 Personal Mono Laser Printer - Manual (Page 92)

Did a fuse blow?
Has a power outage occurred in your area?
Is a toner cartridge installed in your printer?
Is the printer cover closed completely?
If all else fails, try turning your printer off and back on again. If your printer is still not operating properly,
call for service. If you are able to print, press and release Continue to print a menu settings page, which
lists the printer model type and other information the service representative may need to know.
Contact Dell at support.dell.com for more information.