HP LaserJet 1018 Printer - Manual (Page 13)

Printer control panel
The printer control panel is composed of two lights. These lights produce patterns that
identify your printer's status.
1 Attention light: Indicates that the printer media input trays are empty, the print cartridge door is
open, the print cartridge is missing, or other errors. See
Printer information page for more
information.
2 Ready light: Indicates that the printer is ready to print.
NOTE See Status light patterns for a description of the light patterns.
ENWW Printer control panel 5