Copied from: https://support.google.com/chromebook/answer/3227606?hl=en


Reset your Chromebook hardware

To fix some Chromebook problems, you might need to reset your Chromebook hardware, also called a hard reset.

Try a hard reset only after other ways to fix the problem have failed. It will restart your Chromebook hardware (like your keyboard and touchpad), and might delete some files in your Downloads folder.

Hard reset your Chromebook

For most Chromebooks, follow the steps below:

  1. Turn off your Chromebook.
  2. Press Refresh Refresh + Power Power.