Sorry didn't see this post until after I posted below...
I did a system reset, and it doesn't have any option to enter WiFi. When I plug directly to LAN (which has no password), I can get onto the network, but as is mentioned in other threads with similar but unresolved issues, it is a different network than the wifi network. My intent is to use the Apple TV to allow multiple laptops to AirPlay to a large monitor (for teaching purposes). So It is my understanding that the Apple TV has to be on the WiFi network to facilitate this.
Is there some way to force it to go through the wifi setup?