I wanted to get back to you with the troubleshooting steps for you to try to get your kindle to be able to connect to your laptop. it seems these are power related issues and you should turn off WAN and fully charge it from the wall outlet before trying these steps:
1. Plug the laptop into the wall why you are trying to connect the kindle to ensure there is enough power.
2. Plugging the Kindle into a powered USB hub
3. Using a USB Y cord to plug the Kindle into two USB ports at the same time to draw enough power
4. Installing an add on USB card into the computer and using the ports on it