How to Powerwash a Chromebook

Factory reset your Chromebook
Sign out of your Chromebook.
Press and hold Ctrl + Alt + Shift + r.
Select Restart.
In the box that appears, select Powerwash 
 Continue.
Follow the steps that appear and sign in with your Google Account.
Note: The account you sign in with after you reset your Chromebook will be the owner account.
Once you've reset your Chromebook:
Follow the onscreen instructions to set up your Chromebook
Check if the problem is fixed