Why won't my Kodak EasyShare C643 power on?

I see this is years old but had the same problem with my Kodak camera. Finally figured out the battery indicator for how to place the batteries is very confusing. The +/- in the plastic at the top is actually is for the bottom of the battery not the top, so I had the batteries in upside down but thought they were correct. If you look closely at the metal plate that comes down on the batteries, you will see +/- indicators for the tops of the batteries. So turn your batteries around; it just might work. It did for me!