Thanks for posting your question on Justanswer.com, a global paid independent support site.My Name is ***** ***** I will be assisting you today. Do you have replaced the router or only changed the wifi password ?
Thanks for the reply, I am giving you a link below, please download the file and follow the steps to setup the printer with the new router and let me know, how it goes for you.
I can do that for you by remote support, but it is not possible for anyone to reconnect the printer with the router, because you have to do that yourself using the printer's control panel. I guide you to do that also, but it will take time. So, only start when you have time otherwise, we can continue later.