Screen frozen with a dark blue or black screen?
Reboot your Chromebook
Hold down the Power and Refresh ( ) keys & release
Headphones not working?
Open your Chromebook menu by clicking on your avatar
Click on icon that looks like a speaker and select the headphone option
Running slowly?
Check to see if Chrome is up-to-date
Go to top-right corner menu and select Settings > About Chrome OS > Check for and apply updates and follow directions if update needed
Acting up?
Try to sign out and “remove your user” - keep in mind this will delete your downloads
First, sign out. Then, remove the person/user by using the drop-down menu in the top-right corner of your login screen avatar
Log in again by re-typing in your full @gmail.com email address
Still acting up?
Try using the “refresh steps” listed in the Golden Ticket box above
Last resort?
Try “wiping” your device by using the Chromebook Recovery Utility (https://goo.gl/wY6nY) - read about it before trying it