If the keyboard is damaged, you can buy a replacement keyboard, HERE or contact CTL if covered by warranty, contact CTL at Step 2: Reset the EC Controller on the Chromebook If there is dirt and debris on/in the keyboard, clean the impacted areas. If the keyboard is not working, check for damage and or dirt or debris on or within the keyboard. The keyboard has been physically broken.There has been a liquid spill on or in the keyboard.There is dirt, debris on/in the keyboard.Reasons for Keyboard Not Working Properly