I dont know much about that camera but I did own the DMC LC43 and I believe it had a reset button at the bottom of the camera, maybe yours does aswell? If that doesnt work contact Panasonic and discuss the problem with them. Did you take the batteries out and let the camera sit powered off for a few hours?
Like I said, I dont know much about that particular model, but lack of responce I thought Id give a basic suggestion. Hope this helps!
"A coward dies a thousand deaths, a soldier dies but once."-2Pac
A bunch of Nikon stuff!