Apple TV doesn't set date and time and doesn't recognize password and id

Hi, I've been using my Apple TV for years now and when it slows or freezes too often, I just restore it to factory settings through iTunes. This time it just won't work. I set it to my time zone, changed my password, took care to check my id and password on computer home sharing, restarted everything, including router, still, it stops at the "setting date and time" stage. When I ignore this and go to computer settings and try to enter my apple id and password it doesn't recognize either. I don't think it's a router settings problem, since it's been working with the same router for ages, as do my iPad, iPhone. I would appreciate any help, thanks in advance you all.