Prints thick horizontal black lines about .75 inch wide and about .75 inch apart. When a test page is printed, all four colors have the same problem. The lines are so thick with toner that the page sticks to the fuser unit and I have to unjam the paper. Changed the black cartridge, no change. Cleaned everything there is to clean, no change. Calibrated it a couple of times, no change.
Try to replace magenta , Yellow , CYAN
SOURCE: HP K550 blak print failure
Hold the far button on the right down for a minute and it will move the head over for access
SOURCE: I HAVE A HP DESKJET 940C PRINTER. BLACK PRINTING PROBLEMS.
I GOT A CLARIFICATION REQUEST AND I SENT FURTHER INFORMATION BUT AS OF YET I HAVE NOT RECIEVED ANY FURTHER INFORMATION BACK FROM "KEEPITSIMPLE".
SOURCE: New toner prints very light. No setting changes on printer.
I had a similar problem, it turned out to be a cheap toner cartridge. Replaced it with an HP cartridge and have had any problem since.
SOURCE: HP C6180 All-in-one the print
Peter,
Please un and re install the device drivers following the link below:-
http://www.fixya.com/support/r3559995-installing_devices_on_pcs_and_laptops
SOURCE: Just replaced black cartridge in
If this just started after you replaced the toner cartridge, one would have to say that it is a bad toner cartridge.
Print something that smudges. Pull down the front cover and look at the cartridges. Pay attention to the top one(black).
Look at the drum on that cartridge. You should see the toner sitting there. Compare it to the other cartridges which should be clean.
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