Batterys died. went to put new ones in, nothing happens. Lens is out as when you turn camera on, & will not shut off, or anything.

Do you hear or see ANY sound or movement as if the camera is trying to bring in the lens? Is there any dirt or debris that could be obstructing the lens mechanism? Did you try to apply light pressure onto the lens as it is in the process to store the lens?

Sometimes, when the batteries die in the camera, it kills the internal computer. It happened to one of my cameras as well. The cost to have the new computer on mine, installed, was about $230.00. I took mine to the local professional computer repair shop and it was returned to me in less than 24 hours and working great. Your price will vary the make, model of camera. Mine was a Canon 5D mk2. Take it there and let them give you the diagnosis and then decide if it's worth it to repair or replace it. Don't use my fee as your guide, unless you have the same camera.
Hope this helps. Mike