This behavior definitely sounds unusual. In this situation I would perform a complete reset on the camera for further testing. To do this I would first reset the settings of the camera using the Clear All Camera Settings option in the 5th Set Up (yellow wrench) menu section.
I would then clear the Custom Functions of the camera by using the Clean Custom Function settings option in the Custom Functions (orange camera) menu section.
After those two resets I would do a power reset. To do this turn the camera off, remove the lens/battery/memory card from the camera, close the battery/memory card doors, turn the power switch to the ON position, and then hold down the shutter button for 10 seconds.
After 10 seconds release the shutter button, turn the power switch back to the OFF position, and re-insert the battery/memory card/lens. Now power the camera on and test out the Playback and Live View features again.
If you continue to have issues with the camera after these resets please CLICK HERE to reach our friendly Technical Support Team by phone or email.
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