Modem/router problems

So a buddy of mine was trying to hook up his ps3 to his wireless network last night and I showed him how to connect to his router. Well he went in and disabled something so now his network doesn’t even show when you search for it. So basically it’s no longer broadcasting or something. I reset it and have tried several other diagnostics but can’t figure out why it’s not visible when trying to pick up it’s signal. I tried manually connecting to it and it says the network already exists. Create a new one or connect to current one. So I connect to current one and it goes to the list of connections where his isn’t listed… lol anyone have any ideas?
[COLOR=silver]Yay for other wireless connections[/COLOR]