Battery is charged but camera won't turn on - Kodak EasyShare P850 Digital Camera

Try to fully charge the battery, preferably in an exterior charging unit. If the battery doesn't take a charge properly ( depletes quickly) it can stop a camera from starting.

If you already tried that here is a link to some YouTube repair tips:
https://www.youtube.com/results?search_query=digital+camera+won%27t+turn+on

If the rechargeable battery is more than 3 - 4 years old then the battery could be worn out. Rechargeable batteries have a finite number of charge and discharge cycles and will lose their charge capacity over time, i.e. won't charge to 100% and gradually the charge reduces until the battery won't charge up at all. OR The battery shows a 100% charge but when the adapter is disconnected the battery drops off to zero capacity in a very short time. If the battery drops to an unacceptable charge level then the battery needs to be replaced. Rechargeable batteries will fail if stored in a discharged state for long periods.

If the recharageable battery is more than 3 - 4 years old then the battery could be worn out. Rechargeable batteries have a finite number of charge and discharge cycles and will lose their charge capacity over time, i.e. won't charge to 100% and gradually the charge reduces until the battery won't charge up at all. OR The battery shows a 100% charge but when the adapter is disconnected the battery drops off to zero capacity in a very short time. If the battery drops to an unacceptable charge level then the battery needs to be replaced.

If the recharageable battery is more than 3 - 4 years old then the battery could be worn out.Rechargeable batteries have a finite number of charge and discharge cycles andwill lose their charge capacity over time, i.e. won't charge to 100% and graduallythe charge reduces until the battery won't charge up at all. OR The batteryshows a 100% charge but when the adapter is disconnected the battery drops offto zero capacity in a very short time. If the battery drops to an unacceptablecharge level then the battery needs to be replaced.

If the recharageable battery is more than 3 - 4 years old then the battery could be worn out.Rechargeable batteries have a finite number of charge and discharge cycles andwill lose their charge capacity over time, i.e. won't charge to 100% andgradually the charge reduces until the battery won't charge up at all. OR Thebattery shows a 100% charge but when the adapter is disconnected the batterydrops off to zero capacity in a very short time. If the battery drops to anunacceptable charge level then the battery needs to be replaced.

Things to check first for a camera that won't turn on are battery contact points, and micro switches that are located on the battery and memory card doors. Troubleshooting tips on other things that need to be checked may be seen here. These tips won't work for every case, but they're worth a try.

If you can't neither charge the battery through USB nor the wall charger, I would advise to first replace the battery. If that does not help, it will be difficult to tell if it's worth repairing or replacing the camera.

Does there is something happened when you turn on the camera? If you can heard sound made by the len or the camera try to open but turn off in a second? If so, there is something wrong with the lens, and this how to fix camera lens error will be helpful. Else, if the camera are without any reaction you can check it the joint of the camera to battery is well.

Some camera will not turn on (Turn on but not take pictures etc) when you plug it in USB, it will only communicate with the camera PC suite software to transfer pictures.

Regarding the battery, if your camera has mobile phones type lithium ion batteries then you can either charge these batteries outside if you have a charger for them or put the battery in camera and plug the camera with its charger that came with it. Its just like charging mobile phone.

If your camera uses AA size (pencil cell) batteries then you will need to either buy Duracell batteries (or any other good Alkaline battery, Duracell is good) and throw them when they stop working or

Buy rechargeable AA size Ni-MH or Li-Ion batteries with charger. Charge the battery with its charger for at least 12 hours before first use or follow the instruction written on battery pack.

I think you are either using normal carbon AA size batteries that are used in clocks or toys, these will not work in digital camera.

This is likely because:

1. You are using the wrong types of batteries (Alkaline, Ni-Cd or Ni-MH batteries are recommended for digital cameras) NOTE: don't mix different types.
2. The battery is out of charging cycles and won't retain charge. (Most rechargeable batteries can be charged only about 1000 times after which they won't hold charge)
3. The batteries aren't 'powerful' enough. (low quality rechargeable batteries with low capacity shouldn't be used on digital cameras, Always buy batteries specialized for cameras (from camera stores or studios))
4. The wrong battery type is selected in the camera's settings. (Most cameras let you select the type of battery you are using from it's settings. Browse through the settings and see if this is the problem)

Hope that fixed it. Good luck.