Printer can't connect to Wifi after exchange with new Gateaway. other devices work fine, not printe

[Marcia49]

Internet connection, wireless   

couldn't connect to Wifi after exchange with new Gateaway yesterday.  other devices work fine but not this printer

Did call Xfinity and after few tries to work on it, they think it is the setting on printer after exchange with new Gateaway, it changes  I couldn't figure it out

[BeemerBiker]

Click here for network setup in a different language

Wi-Fi setup video. Method 1 is for Modem or Router connection
and Method 2 is for Wi-Fi Direct when you do not have access to the modem. It only uses the 2.4ghz band so all devices must run at slower speed of 2.4.  
https://www.youtube.com/watch?v=Jh79Blswk84&ab_channel=PrinterTales

You may need to do a factory reset
https://www.youtube.com/watch?v=o_zODVaAKq8&t=27s&ab_channel=303Electronics

after resting then connect to the 2.4ghz band in the modem.  Let me know if you new modem is a flex system (multiple wifi boosters) as connection is more complicated.

Full feature software

4500e - 4504e
https://ftp.hp.com/pub/softlib/software12/COL47762/mp-115701-6/Full_Webpack-116-Full_Webpack.exe

Envy Reference

[Marcia49]

Tried few methods that you gave me for few days but still it wont connect to wireless router and I tried to find where I can add printer's MAC address to list of allowed devices but nothing there.  So frustrated.  The printer worked wonderful before I exchanged for new router.  It screwed up on new router.