How do you fix a Nikon Coolpix s3000 lens error?

The Grainy look of the picture is due to the setting called ISO (it's too high, just lower it and it should improve).

If there is a lens error then I would have to say...don't jam or push the lens in. The lens turns like a screw so if you jam or push the lens you could ruin the threads within.

Most times you would have to take the camera apart and clean it or set it back on it's track.

I once read, try banging it on your palm when powered off.