Originally Posted by nate8nate
Have you tried unplugging it and holding the power button for about 10 seconds? Mine did something similar and it worked fine after I restarted it.
for future reference, if this fails the next step is recovery mode....from personal experience. and it worked.
specifically: "Press and hold the power and media buttons for 15 seconds. The device reboots into Recovery mode (content is not erased, allows for firmware reinstall). This is a good option if you want to keep the content on your device, but reinstall the firmware."