Can you please elaborate?
Do you have a option to rerun wifi setup on the Apple TV?
Have you tried rebooting the Apple TV device?
Well I am not very familiar with the Apple TV device, I took this question before it was mentioned that this was about a Apple TV, I will have this question moved to the Apple section where someone there should be able to help you.
Hi and Welcome. My Name is ***** ***** I look forward to assisting you today with your question.
What exactly do you see when you turn on your Apple TV ?