why does the printer insist that all 3 color cartridges be replaced when only one of them runs out?

[neillhough]

My 8720 pro printer will indicate that one color cartridge is running low and therefore every time I want to print I have to go to the printer and push a button to print until it finally says I have to replace that color ink cartridge.  However, as soon as you replace that one color the printer gives you a new message saying the second color is now out and must be replaced and you can't print anything until you do this.  When that is done the printer says the third cartridge now needs to be replaced as well and you can't print anything until that is done as well.  This has happened every time one cartridge runs out and is very expensive since the other two colors still have ink in them.  What is wrong??

[KrazyToad]

@neillhough

Welcome to HP Community

I have gone through your Post and would like to help
 

Please try these steps

- Turn on the printer.
- Wait until the printer is idle and silent before you continue.
- Disconnect the USB cable from the rear of the printer. If your printer has a network or wireless connection, leave it connected.
- Remove the ink cartridges from the printer.
- With the printer turned on, disconnect the power cord from the rear of the printer and from the wall outlet or power strip.
- Wait at least 60 seconds.
- Plug the power cord back into the wall outlet.
NOTE: HP recommends connecting the printer power cord directly to a wall outlet.
- Reconnect the power cord to the rear of the printer.
- Turn on the printer, if it does not automatically turn on.
- The printer might go through a warm-up period. The printer lights might flash, and the carriage might move.
- Wait until the warm-up period finishes and your printer is idle and silent before you proceed.
- Reinsert the ink cartridges, and then close the ink cartridge access door.
 

Next ensure the printer has the latest Firmware. Link: https://support.hp.com/in-en/document/c02919168

Keep me posted how it goes

If the information I've provided was helpful, give us some reinforcement by clicking the "Solution Accepted" on this Post and it will also help other community members with similar issue.