I'm not familiar with this particular camera but, assuming that the camera was not dropped, I would first verify that you have all of the settings(especially focus) in the auto mode.

This has happened to me with other cameras where I've accidentaly made a settings change. The fact that you state that all of the pictures are out of focus leads me to believe that there is a setting changed to manual or the autofocus motor has frozen.

Hope this gets you going in the right direction