"Printhead appears missing" on new OfficeJetPro 7720

[Roger9819]

OfficeJet Pro 7720 printhead appears to be missing, not detected or incorrectly installed

[Roger9819]

with new HP cartridges

[KrazyToad]

@Roger9819

Let's start with a printer reset

(1) Turn the printer on, if it is not already on.
(2) Wait until the printer is idle and silent before you continue.
(3) With the printer turned on, disconnect the power cord from the rear of the printer.
(4) Unplug the power cord from the wall outlet.
(5) Wait at least 60 seconds.
(6) Plug the power cord back into the wall outlet.
 NOTE: HP recommends connecting the printer power cord directly to the wall outlet.
(7) Reconnect the power cord to the rear of the printer.
(8) 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
 
Then update the Firmware from this Link: https://support.hp.com/in-en/drivers/selfservice/hp-officejet-pro-7720-wide-format-all-in-one-printe...

If the issue persists follow the instructions in Steps 3 - 7 in this Link: https://support.hp.com/in-en/document/c05523880

Let me know 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.