supply system problem

[sovereign1]

new cartridge not recognised on officejet pro 8720 "supply system problem" second cartridge not recognised also

[Nal_NR]

Hi @sovereign1,

Welcome to the HP support community.

I'd like to help!

Clean the cartridge contacts

Turn the printer on.

Open the door to access to the cartridges.

Wait until the carriage stops moving before you continue.

Push in on the front of the cartridge indicated in the error message, and then remove it.

Wipe the electrical contact on the cartridge with a lint-free cloth.

Insert the cartridge into its color-coded slot until it snaps into place.

Repeat these steps for any other cartridges indicated in the error message.

Close the cartridge access door.

Refer to this HP document for more assistance:- Click here

Hope this helps! Keep me posted for further assistance.
Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!

[Nal_NR]

Hi @sovereign1,

Hope I was able to fix the issue. If you need further assistance, feel free to reach out to us. 

Give us some reinforcement by clicking the Accepted Solution button, that'll help us and others see that we've got the answers and did reply to you!

[Nal_NR]

Hi @sovereign1,

As we did not hear from you, I'll be closing this case for now. If you need further assistance, feel free to reach out to us.