It was already connected before the screen went to black.
Thank you for clarifying, Susie. What troubleshooting steps have you already taken? BrittanyC_VZW
Removing battery and putting back in worked for me also. Thanks to all who posted this solution!
I unplug the Jetpack from the power source, then remove and replace the battery. This works for me.
Same here...pulling the battery out...then reinstalling fixed the problem