Pentax Optio S4 troubleshoot

[vouts]

Hi, I've had my pentax optio s4 for just over a year and recently I started having this problem. The camera turns on but in picture and movie mode just gives me a blank screen. If I press the picture button it will take but the result is just another blank pic for the screen. Video mode is the same. If I use the voice recorder feature the camera works just fine. Does anyone have any clue as to why im getting a blank screen. Any suggestions on how to fix the problem would be greatly appreciated.

Thanks.