I dropped my camera and now it won't work?

I was outside on my tripod, and I took it off, and I accidentally dropped it. My camera is a Panasonic Lumix, and now it won't turn on. When I open the lens cover, and press the on on, it works for one moment, then it says "Please Open The Lens Cover." I don't know what to do! What happened to it? And it dropped on stone tile patio. what to do? Please help!