printer will not reconnect to wifi after a factory reset was performed on router

[Freebird62]

A factory reset was performed on our wifi router.  Now the HP DeskJet 3700 all-in-one series printer will not reconnect to the wifi.  I tried the HP Smart app. which has me select the printer, then says the printer must be turned on however it is on.

[BeemerBiker]

I recommend you reset the printer as described in this video.

Since your router was reset you will need to either program a new WiFi password or use the password listed on the modem.

I recommend you log into your modem and make the following changes:

I have an Arris modem, yours may be different. This tutorial is helpful. The username might be "admin" and the password should be printed somewhere on the modem. If not, then use that tutorial. Use a different name for the 2.4 and the 5ghz bands. To keep it simple, use the same password and use only numeric digits such as someone's phone number. When in the router, run the app that finds the channel with the least amount of noise for both bands.

Unless I am mistaken your 3700 only recognizes the 2.4ghz band.

This video shows how to connect the printer to the router.

https://www.youtube.com/watch?v=tJmrG_mB_LM

My arris modem tends to lockup after a power glitch and I put it on a cheap battery  backup to avoid having to reset it.