Method 2: Reset from the device
These methods only erase the device and set it back to the original preserved ChromeOS on the machine. Not an actually erase and reinstall of the ChromeOS.
ChromeBooks
Shutdown the machine, hold the escape and refresh key and start it up. It might take you a few tries, but you should eventually get this:
Press Ctrl+D
Press Enter
Press Space bar
Press Enter
It should reboot on it’s own, but sometimes it seems like it doesn’t respond until I press “Enter”
Then you will get the following screen and need to enter a wireless network in order for it to connect back up with our Chrome management system.