My NIkon Coolpix P520 won't turn on?

I was taking pictures with my NIKON Coolpix P520 and I got the message that my battery was exhausted. I tried my spare battery, but the camera wouldn't come on. I assumed it was dead too. I charged both batteries and the camera won't turn on with either of them. When I try to charge a battery in the camera, the light on the on button comes on, it beeps, and the charging light flashes slowly. But even after charging, the camera still won't turn on. Any suggestions? Thanks.

Read more: My NIkon Coolpix P520 won't turn on?

How can my camera screen show on my computer screen?

I have an Nikon coolpix l120. I want to record a video on my digital camera but I want to be able to see what my camera is recording by looking on the computer screen. How can I do this, do i need to download something? Or is it even not possible. Thankss.

Read more: How can my camera screen show on my computer screen?