12 printer lights are on or flashing, What the lights indicate, Wireless status light is flashing – HP Deskjet 6840 Color Inkjet Printer User Manual

Page 159: Power light is flashing, Resume light is flashing, There might be a paper jam, Print cartridge status light is on or flashing, If the light is on and not flashing, If the light is on and flashing, Printer lights are on or flashing