I just changed my black cartridge and the printing

Regarding your recent inquiry about the HP 74 or HP 75 poor print quality problem your HP OJ5780 printer is currently experiencing, we suggest you perform the following corrective steps to help resolve the issue:

Cartridge & printer maintenance should be evaluated - ensure both ink cartridges and flex cable contact surfaces (where the cartridge interfaces to the carriage inside the printer) are thoroughly clean: http://inkjet411.com/?page_id=1519

1) Gently blot the cartridge Nozzle Plate with a damp lint-free towel/wipe - a small amount of ink should be dispensed, and be visible, on the towel (all 3 colors should be present for a Tri-color cartridge).

2) If no ink is dispersed from nozzle plate (i.e. visible on towel) or ink cartridge completely fails to print on paper after installed in printer, then more drastic cartridge and printer cleaning steps will likely need to be performed to recover ink cartridge (NOTE: foam inside cartridge can dry out and become very hard - the foam must be moist with ink to function correctly (i.e. ink flows and wets the nozzle plate). Refer to 'clogged ink cartridge recovery' video here: http://inkjet411.com/?page_id=2818

Providing the ink cartridges are clean, the problem may be caused by a dirty wiper blade or poor seal in the service station (capping station where the ink cartridges park when not in use) and this is causing the poor jetting / print performance issue you are observing. Remove the ink cartridges and thoroughly clean the wipers and seals: http://inkjet411.com/?page_id=1519

If the issue continues then please refer to 'Troubleshooting' section on our website - the printer manufacturer websites are also provided here: http://inkjet411.com/?page_id=106

Run a quick printer 'self test' (see link below for instructions) or print one of the Inkjet411 test prints to evaluate cartridge performance (i.e. 4-color test print): http://inkjet411.com/?page_id=146

Advanced HP Printer Diagnostics (i.e. printer self tests, etc.): http://inkjet411.com/?page_id=1813

You can also check our 'Print Quality' page of the 'General Information' section of the Inkjet 411 website and follow additional suggestions provided, particularly if the cartridge is not causing the poor image quality problem (i.e. printer driver settings issue): http://inkjet411.com/?page_id=1432

-Thank you
Inkjet411 Team Member ([email protected])

If you touched the electrical contacts on the cartridge the high voltage used could be taking a shorter path to ground. Try cleaning the contacts on the cartridge and inside the printer with a lint free cloth and some 99% isopropyl alcohol then wipe dry.

hey,

go to your print software try cleaning the printin threads like red eye removal and all go to ur printer software


BTW UR MODEL

check the printhead.... print a print quality page from the settings button select print reports then print that page. there is a printhead health area as well as color blocks if there is streaks in the black yellow blocks or says poor the black/yellow printhead needs to be replaced. if it says good call hp for further troubleshooting and possible replacement under warranty

Is the cartridge an original HP or an inexpensive compatible? The black cartridge could be out of toner. Not a common defect for the Q6000A cartridge though. If it is a poor quality compatible the defect may be the result of a misaligned internal component. Either way replacing the black cartridge should resolve the issue.

black developer on drum worned out,need changing.

I would suggest you get a set of original HP cartridges .. I have clients trying to save $ all the time by buying refilled and/or refilling themselves to only go and get HP brand. Refills just don't cut it .. leaks, poor print quality, unrecognized cartridges .. there are so many things that I can point out .. save yourself the hassles .. get HP

Try to disconnect the power cable from the back of the unit and reconnect it after few secs. The alingment will start itself. Complete the alingment once.

Hi, have you tried another cartridge? Sometimes if a cartridge has been sitting around for a while, they become blocked with dry ink and print quality gets poor.

Hav you replaced with original cartridges or 3rd party/refilled ones? This is a common problem when using generic/refilled cartridges. Let me know that first..

When you say poor quality, do you mean faded printouts, or broken print? Kindly explain in detail, so I can assist you further.