Hello Jim,
Thank you for posting in Microsoft Community.
The black screen with a battery icon indicates that your Surface Pro 4 battery is critically low. You need to plug in your device to a power source immediately to charge the battery. Once the battery is charged, you should be able to use your Surface Pro 4 normally.
If you encounter problem with your charger in which the LED light doesn't come on, see What to do if your Surface power supply or charger doesn’t work - Microsoft Support to troubleshoot the problem.
If you continue to experience issues with your device, please let me know, and I will be happy to assist you further.
Kind regards,
Lavenia