Actually there is a simple fix. Power off the Nexus 7, then use the 3 finger start up, press volume up, volume down, and power until you access the bootloader, use the volume buttons to scroll to power off and wait until you see the battery icon in the center of the screen which denotes that the device is changing, let the tablet charge for a while, power up the Nexus and you are fixed.
Sent from my SCH-I535 using Tapatalk 2