printer office jet pro 8720 remove dynamic security

[CdnBlu]

I wish to override or remove the dynamic security system on my HP OfficeJet Pro 8720. I use only HP ink. The message on the printer states 'depleted cartridge needs to be replaced" I replaced the black ink and only want to print in black. The message is stating to replace the color cartridges too. I had 900 pages left in each cartridge but still the printer will not print unless I replace all empty cartridges.

[Betty0610]

@CdnBlu

Welcome to the HP Support Community.

Unfortunately, you can't override it. If you're using HP ink, non refilled ones, this message should generally not pop up. to find out whether this is a cartridge or printer/printhead issue, do you have a spare color cartridge to check if the error comes up with that too?

​​​​​​​Thanks!

[Bob_Headrick]

Some additional information.  The issue is not related to dynamic security, it is due to the cartridges actually being empty.  The proper is blocking printing to protect the [rather expensive] printhead.

HP and other printer manufacturers have different printer technologies for different needs.  For inkjet printers:

• Some have printheads built into the ink cartridges.  These printers can typically print with one or more of the colors completely empty, or even with color or black (but not both) cartridges removed. The Officejet 8040a is an example.
• Other printers have separate ink supplies and replaceable printheads.  An example would be the Officejet Pro 8700 series.  The printhead in these printers can be replaced if they are damaged by running the printhead with colors out.  Some of these printers will allow printing with a color out, other will not.  If the printer is run without ink in one or more colors the printer may be damaged, but the user may be able to recover without having to send the printer for service. 
• Other printers have permanent printheads.  To run these without some ink in all the colors would risk causing damage to the printhead due to clogs, air ingested in the printhead or burned out printhead firing resistors. The Officejet 6978 is an example of this type of printer. For printers with fixed printheads this could require service to get the printer to print properly again when the ink is finally replaced. 

The document here describes how ink is used.  While the document is written for HP Inkjet printers the same principles apply to inkjet printers from other manufacturers.