Black Ink won'r print. All cartridges are full;

[Halimah22]

I have taken all the steps on the HP suppot page for 4620 no black,  Checked cartridges, clean printheads, opened cartridge vent downloaded new software.  The printer will print color, but no black.  If I change text to dark blue, yes it will print.   On the test page the color is perfect but no text in black and no black.   Very frustratiing.

[Bob_Headrick]

The troubleshooting steps in the document here may help resolve black not printing on your Officejet 4620.  

If the standard troubleshooting did not resolve black not printing I would suggest removing the black cartridge.  Turn it over and examine the area around the ink port.  There are four orange plastic spots, left over from the protective cap.  Make sure these are flush with the cartridge body, if not carefully trim them flush.  If the plastic nubs protrude they can prevent the cartridge from seating properly.  Before replacing the cartridge in the printer dribble a few (maybe four) drops of hot water into the ink port in the printer and two drops into the ink port on the cartridge then snap the cartridge back in position.  

It may also help to manually clean the printhead as described in the post here.

I have also seen cases where leaving the printer overnight after the cleaning cycles allows black to recover.

If none of the above restores black printing your printer will likely require repair or replacement.

[ecogail]

I had my ink levels reading fine, but blue and magenta would not print, yellow did print when I did the tools/checks, etc.

I had to go out and buy ink to solve the problem, this is the second time this has happened and it is not fair i am being charged for ink I had to buy elsewhere due to cartridge failures or cartridges not being filled up correctly with the right amount of ink or the ink hardening or whatever the failure is that keeps happening.

so needless to say, I went out and bought ink again, even though my levels still reported to be fine.