How to reset the password and get access to the printer's admin panel?

Question

HP

There is an inkjet MFP HP DeskJet Ink Advantage Ultra 4729 .
The printer has a built-in WiFi module. The task is to connect to a new router (3rd generation Apple Extreme), but the printer stubbornly does not want to connect, it requires you to enter an administrator login and password.
Q: How do I reset the password for the Printer Administrator Console (aka the Embedded EWS Server).
I rummaged through the entire English-speaking Internet in search of information, nowhere is there data or at least instructions for resetting the password. I also tried all the tips from HP on connecting to a wifi network, the result is zero.
The printer is under warranty, you may have to take it to a service center, but I would like to resolve the issue at home. Who faced this phenomenon, tell me how to reset the password or do a general reset (cold or hard reset)

Answer 1

solution found. the answer is below:

EWS password reset for HP DeskJet Ink Advantage Ultra 4729 All-in-One Printer
‎07-06-2018 03:40 PM
Thank you for responding,
This is the Riddle_Decipher, again!
It's great to have you back ;)
That's quite strange that the EWS reset didn't do the trick, although, you are right, it looks like we'll need to use the secret weapon as the last resort to perform a complete reset of the printer:
The Semi full Reset:
[while applying power]
Press WIFI Direct + Color Copy
The Full Reset:
[while applying power]
Press WIFI Direct + Black Copy
Note:
Unplug the power cord, then hold the Wi-Fi + color copy buttons, and then plug the power cord into the printer while holding both the buttons to access the reset menu, then you can let go of the buttons and use the menu to select the reset option.
We suggest you try the partial reset first, if it doesn't work, try the same steps as above and this time select a full reset to resolve the issue.
Keep me posted,
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Give us some reinforcement by clicking the solution and kudos buttons,
that'll help us and others see that we've got the answers!
good luck.

Answer 2

https://h30434.www3.hp.com/t5/Inkjet-Printing/How-...