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For this type of behavior I recommend performing a complete reset on the camera to see how it responds. To do this I would make sure it is powered off and detach the battery.
Next, use a pointed object to press and hold the reset button for 5 seconds. The reset button is located near the hinge of the LCD above the SD card slot. After 5 seconds release the button, and re-attach the battery. Finally, power the camera on and see how it is operating.
If the issue continues please contact our friendly Technical Support team via phone at 1-800-828-4040, M-F 9AM - 9PM EST, for further assistance.
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