Listed are different short cuts, trouble shooting methods and best practices.
Plug in the device to a power source. Hold the refresh button down first then the power button down for 5 seconds.
If the screen still does not turn on press the power button again.
On the Chromebook sign-in screen, select the profile you want to remove.
Next to the profile name, select the Down arrow .
Select Remove this user.
In the box that appears, select Remove this user.
Step 1: Click the System Clock located in the bottom-right corner.
Step 2: Click the Gear icon located on the pop-up menu. This takes you to Settings.
Step 3: Click About Chrome OS listed on the left.
Step 4: Click the Check for Updates button. This checks for the latest version and installs any updates.
Step 5: If your Chromebook updated, click the Restart button to complete.