Sony DSC-QX30 Manual De Instrucciones página 29

On the overheat protection
GB
Depending on the camera and battery temperature, you may be
unable to record movies or the power may turn off automatically to
protect the camera.
In this case, leave the power off and wait until the camera and
battery temperature goes down. If you turn on the power without
letting the camera and battery cool enough, the power may turn off
again or you may be unable to record movies.
29