black lines down the side of every print job (HP LaserJet 500 Color M551). cleaning page did nothing. any ideas of what might be wrong? : r/printers
Canon Knowledge Base - Perform print head cleaning i80 / iP90 (Windows)
printer - HP Laserjet 4100 "Jitter" - Super User
HP 920 Ink Series Printer Models | INKJET411
HP OfficeJet 8700 Printers - Black or Color Ink Not Printing, Other Print Quality Issues | HP® Support
This printer cleaning/maintenance page which activated in the middle of me printing documents and stalled my work for 10 minutes. : r/mildlyinfuriating
Cleaning the Print Head
HP Officejet 6000 (E609a) and 6000 Wireless (E609n) Printers - Cleaning the Printhead | HP® Customer Support
FAQ Article Page | Epson Hrvatska
Printer cleaning page checker pattern that I found at work (that must waste a lot of ink) : r/oddlysatisfying