Can't connect to my OfficeJet Pro 6230

[SaucySally]

My system: Laptop with Windows 10 Pro; I am local admin. Printer is  Officejet Pro 6230.

My situation:  Just  over a  year ago I installed and connected this printer with WiFi no problem. Since then I have been away and the printer was switched off, though mains connected. Now I have replaced and re-installed my WiFi network, and all other devices work fine with  it.

However the printer refuses to connect to the new WiFi network. With some effort I have made it print reports which show that it is still remembering the old, now deleted, WiFi  network and attempting to connect to that,  although it does detect the new network but seemingly will not attempt to connect to that.

From HP I  have  downloaded and installed some promising-looking tools, but  sadly everything which seems to offer hope  is "locked by administrator". My browser prompts  for credentials, but none of the meagre credentials which the HP applications offer works.

All I need to do is remove from the print device's memory all trace of the old network and password and have it connect to the new. Can that be so difficult?

Caveat. I realise that this is my first post here, and I have indeed not yet been able to fully search for and find  possible earlier instances of this problem. I will. But as the register and log in process affords me this opportunity to post, and who knows  when I will be able to get back here (the HP site is so chaotic and unstable), I am making the best of it.

All I need to do is scrub all my print device's settings and start again, Can that be  so difficult?

[8lives]

On the printer control panel, press and hold the Wireless and the Cancel buttons together for about five seconds, and then release the buttons

[SaucySally]

Hi 8lives and thank you so much for your speedy answer. However, working into the night and trying every HP tool I could find I somehow persuaded the printer to access the new network. It is now connected and working, although "HP Smart" still resolutely declares "Printer offline".

If I have the problem again I will certainly try your solution.

[SaucySally]

Although  I  can now connect, and print, "HP Smart" still resolutely declares "printer offline". Although the original problem appears resolved, this still bothers me as like many IT professionals, I like to exactly understand what is going on. Can anyone explain this "HP Smart" behaviour or offer a solution?