No error messages; indeed, every troubleshooting program (whether HP or Windows) says everything is fine. It is NOT the Black cartridge, because I have tried three different cartridges with black ink, two of them brand new, one XL the other one regular size. Is it the printhead gone bad but only with black? Is there a "fix" if it is a bad printhead?
I'm guessing after a month you've given up and bought a new printer, or you fixed it, but just in case...
If the cleaning cycles don't work, you could try the process in this YouTube video. It worked for me after I was told my printhead was bad and I needed a new printer. So I'm hitting all the threads complaining of this problem to save people a few $$s if possible. it's not my video and I'm not affiliated with the person, I just hate when good solutions aren't offered by manufacturers.
place a slightly damp paper towel underneath where the printhead moves, press down firmly to get it flush so the head can pass over it. (I struggled with this, and ended up just holding the corner of it until I could get the head over it)
manually slide the printhead back and forth several times. I had to use 2 paper towels and refolded both because the black ink covered them quickly.
replace the ink cartridges.
my step 6. run the clean print-head cycle a few times. I still had some fading/streaking so I think I did the 3 cleaning cycles twice before I was satisfied. Black in and color prints look perfect again
The video says you have 5 minutes before the printhead returns to "maintenance mode", so watch your fingers and get it done in 5 minutes. I didn't have any problems and my printer prints just fine now.
Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".