To fully restart a Chromebook, click the time in the lower right, then click the power button near the top. Alternatively, you can hold the power button until the screen fades to white then turns off.
After a few moments, press the power button on the device or close and open it to turn it back on.
Force Reset
If your Chromebook is completely unresponsive or if it won't power on, you can force it to restart by holding the Refresh key and pressing the power key or button. This looks like this on a Chromebook's keyboard:
We don't recommend doing this often as it can damage your device. If you do have to do this regularly, please contact tech support using the methods below for help.