*Make sure the mode dial is not out of place
*Take out the batery, wait at least 1 minute, and reinsert.[make sure the battery is still charged.]
*Also, try a different compatible memory card.
Lumix DMC - TZ3...I was replacing the memory card when I turned the camera on and the batt/mem door opened up. I closed and locked it and the camera beeped twice and shut off. Will not turn on now. Can anyone HelP?