Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
That sounds like a worrisome situation.
Does the WiFi light stay On steadily?
When you say, you cannot access the choices, what exactly do you mean? what choices did you try to access and how did you try to access them, please?
Having bought a new WiFi (I presume you mean a new Wireless network router box) you will need to re-do
A. the printer's own connection-to-WiFi settings
B. the computer's installation of the printer's drivers, to correspond to the new WiFi
unless you have configured the new WiFi router box to have exactly the same SSID or wireless name, and exactly the same WiFi passphrase, as the previous WiFi router box had - in which case, (A) may not be necessary. (B) will still be necessary though.
Let me know, please, so that I may advise you further in sufficient details to help you solve this problem. Thanks.