Ho envy 6400 printer connect to wi-fi

[Gynphys]

Was connected to the internet. Changed name. Won’t link up now

[Elohi_NR]

Hi @Gynphys,

Welcome to the HP Support Community. 

I'd be happy to help you! 

I understand that you are facing issues with the connectivity. 

Are you trying to connect the printer to a home or public network?

I would like to know, is your router set to work on 2.4 GHz network or 5 GHz network band?

Meanwhile, follow the instructions to connect the printer to the network

Connect the printer with WPS

If your router supports WPS, use these steps to connect your printer to your wireless network with the WPS button on the router.

Turn on the printer.

Locate the WPS button on your router, but do not press it yet.

If your router does not support WPS, skip to the next step to connect the printer with the HP Smart app.

On the back of the printer, press and hold the Wireless button 

 and Power button 

 at the same time for 3 seconds.

On the router, press and hold the WPS button for 3 to 5 seconds or until it shows that the WPS connection process has started.

NOTE: 

The printer stops searching for a WPS connection two minutes after the wireless button is pressed. If you were unable to press the WPS button within that time frame, attempt these steps again.

Once the printer connects to the wireless network, the purple Wireless light on the control panel turns on solid.

You may also refer to HP printer setup (HP Smart app)

For wifi- connection issues, Click here

Try firmware update. Click here

Keep me posted for further assistance.

 Please mark this post as “Accepted Solution” if the issue is resolved and if you feel this reply was helpful click “Yes”.