Apple investigating reports of frozen iPad Pro slates, with a screen that turns black after charging
Apple has now acknowledged that this problem exists, and is investigating. On Apple's support website, the company posted instructions on what to do if an iPad Pro "doesn't respond when you press buttons or tap on the screen, and the screen is black." The answer, for now, is to force reset the tablet by "pressing and holding both the Sleep/Wake and Home buttons for at least ten seconds, until you see the Apple logo."
Both 32GB and 128GB models are affected, covering both Wi-Fi and Wi-Fi + Cellular versions of the tablet running on iOS 9.1. Apple just launched the 12.9-inch iPad on November 11th, after unveiling the tablet back in September. Available in Silver, Gold or Space Gray, the 32GB Wi-Fi only model is $799 while the 128GB version is priced at $949. The Wi-Fi + Cellular Apple iPad Pro comes with 128GB of internal storage, and is priced at $1079. Apple is offering the stylus-like Pencil for $99, and the Smart Keyboard for $169.
source: Apple via MacRumors