Does anyone know why a digital camera won't power on?

I bought a Nikon Coolpix by accident that doesn't power on. Any techno-geniuses out there who might know why this is? (besides the batteries-which are fine!) Could it be a short? Is there any hope? Do I need to take to a professional?

lot of possiblities are there.........
1. Battery power.
2 . memory card or slot got short circuited.( Try removing the memory card)
Rest can be checked only by a service engineer.
3. Focusing motor doesn't resets.
4. lens barrel got jammed.
5. Main pcb failure.

Either your batteries are not put in the proper way or you are not using the right button-read the instructions.

may well be a lose cable in their somewhere thats not making connection.... check the battery compartment make sure the contacts are all clean... apart from that i think you need to take it to a repair shop : (

May be u haven't inserted ur memory card ?
It happened with me once :p