<!-- from fixya rte -->My Nikon Coolpix P100 won't turn on - COOLPIX Nikon Cameras

SOURCE: My Nikon COOLPIX S51 Will not turn on.

Your problem may be due to weak/worn out batteries or corrosion on the battery contacts inside the camera which can prevent the full power of the batteries from flowing into the camera. Try this free fix before you do anything else: remove the batteries and wipe the camera contacts firmly with a dry cloth (heavy corrosion may require cleaning with a wire brush, steel wool, or sandpaper). Remove any residue that may have fallen into the battery compartment during cleaning, then wipe both ends of the batteries and place them back in the camera. This cleaning clears the problem about 90% of the time. If it doesn't work for you, your batteries may need to be replaced, or the camera may have a problem that requires professional repair.

SOURCE: how do i download pictures from my nikon coolpix

If the camera came with a usb cord use it and observe if the computer recognises it.It will give you a dialog box asking you what to do.If not get the memory out of the camera and put it to your cpu card reader (if it has one).Download the photos from there.

SOURCE: I have a nikon coolpix

I think you should return it under warranty.

SOURCE: nikon coolpix p100 user manual to print

http://www.nikonusa.com/pdf/manuals/noprint/P100_ENnoprint.pdf

SOURCE: when i put hd video

Your computer is under-spec to play high def video