https://support.google.com/chromebook/answer/6309225?hl=en

The article linked above includes troubleshooting steps for ...

Hardware Problems:

• Battery won't charge
• Bluetooth doesn't work
• Camera doesn't work
• Can't connect to monitor
• Keyboard doesn't work
• Sound doesn't work
• Touchpad doesn't work
• Touchscreen doesn't work

System Problems:

•  "Chrome OS is missing or damaged"
• Chromebook crashes or freezes
• Chromebook is slow
• Chromebook turns off, then back on, over and over again
• Chromebook won't turn on or won't charge
• System update causes error
• System update won't download

Webpage 

• "Aw, snap!"
• Tabs refresh constantly
• Webpage won't open