When in standby, camera comes on by itself

When camera is not in use, I press the power button to place camera in standby. While laying flat on a table, the camera comes on by itself, extending the lens, preparing to shoot. When picked up, the screen flashes like a strobe showing whatever it sees like individual shots in a movie format. When this is happening, there is no control of the camera or even the power button. I have to remove the battery to regain control.

One symptom I notice is that the power save mode icon stays in the icon bar and I can't turn it off in the settings-power-power saving mode slide. I have purchased a new battery and have done a complete factory reset and still have the problem. Can you help or tell me how to find help? Thank you.