Lens stayed out

You may have a damaged lens mechanism. This happens most often due to some shocks received by the camera. This problem will require service assistance because a lens mechanism is a VERY delicate equipment that needs calibration and proper tools to work with.
The single thing you may try is to press back the lents using 2 fingers, one at each side, aplying equal pressure. Don't force them too much however if you see they don't want to get back. Turn on, then off the camera and while it tries to do the same job, give it this ..help. You will hear a click sound when the lens come back in. This works for about 30% - 40% situations, but it depends on the type of damage the camera suffered.

Hello!

Same mechanism problem here on a DSC-W50. For me, it did not work out to PULL the lens, but to push them. I just opened the camera and it tried to calibrate the lens with no success for about 4 times, after it just let them out and displayed the "power off and on your camera" message. The problem is that on this model of camera when the lens is out you cannot push or pull it. So I thought of a trick: when the lens is moving, you can pull or push them. Anyway, this is what I did: with the lens out, i placed the camera with the lens towards a soft surface (bed) and gently pushed on the side with the display. First times it didn't work, so I had to push harder and finally it worked and now my lens is aligned and the camera is working as if it were new. I suggest you try to push or pull the lens while it is moving GENTLY at first, and if it does not work, try harder - really hard! It will do a click at some time and work fine!

Mine did the same thing, and after I read this, I decided to turn the camera on, and as the lens was extended, I gave it a couple of taps. It worked! Try not to hit it too hard though.