Sound no picture, picture;no sound

I have: Panasonic 42'' TV. Yamaha RX-v663 receiver, Panasonic Blue Ray disc player and direct TV since Sept. 2008. Prob. 3 days ago I got a message on the TV: Shutting down in 3 min's etc. I can get the menu on my TV, the hdmi 1 receiver info, but I can't get a picture on the TV. I get the sound from the radio when I turn the receiver on, but when I turn on the TV, I get TV sound and no picture. The Geek squad hooked this all up for us and nothing has been touched fron them until now?