How do I know if I broke my digital camera or just the lens?

I dropped my Olympus e-300 the other day and now it seems to be having issues. The camera will take pictures however lens will not focus (14-45mm) when I am zoomed in. I can hear the lens engaging and I see it move, but the picture stays fuzzy and sometimes the button stops allowing full view of the meter but will not allow you to take the picture while in certain modes - including manual - however if you set it for fast action it is just fine.

The image shows up on the LCD, the menu's work and everything else acts as normal.