Printer acts like its printing but no print at all on pages. Replaced all cartridges OSW7 Enterprise

[Printman3]

Not printing at all, It acts like its printing but print on pages(blank). I have replaced with OEM HP cartidges.  I have replaced drivers, reinstalled printer several times but no print. Can anyone HELP with this?

"Quote" 

The First sign of insanity is doing the samething over and over and expecting a different result!"

                                                                                                                                                                                                               "somebody"

[Bob_Headrick]

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

If the standard troubleshooting did not resolve the printer 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 the printer to recover. 

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