Blinking Lights on the HP Officejet K7100, K7103, and K7108 Printer Series
Lights blinking, or flashing, on the printer can signal a possible issue with the printer. This document lists steps to correct any issues shown by the flashing lights. Find the pattern of flashing lights that matches the lights flashing on your printer, and then follow the directions.
NOTE:Flashing lights can be caused by multiple issues, so there might be multiple solutions listed in each section.