So I was trying to play the Wii on our new TV, and I had some issues figuring out how to get to to video one. Finally I found I found out I had to click 'source', then the DVD/Video slection, or whatever it was called, but I accidentally clicked PC. So I just went right back to TV, but that's when it said no or weak signal. Obviously I didn't unplug or change any plugs of anything in the TV because it worked just fine when I first plugged the Wii in. It only stopped working after I went to PC then back to TV. I unplugged my Wii, tried turning it on and off, tried changing the channel, repeatedly hit the cable and TV buttons, tried going to PC then back to TV again...but nothing works. All I get is a black screen or static, both with a box that says weak signal. All of the other TVs in the house work, too. I checked all the chords in the back of the TV; they were all completely plugged in, in the right places.

Can someone tell me how to regain the signal?