First, check that:
The charger or adapter cables are completely plugged in, both to your Chromebook and the wall.
The power outlet is working.
If your Chromebook still won't charge:
Unplug your charger from the wall and your Chromebook.
Plug your charger back in to your Chromebook, then the wall.
Charge the device for at least 30 minutes.
If the charging port appears damaged, submit a Help Desk ticket ASAP.
Make sure that your Bluetooth device is supported and fully charged.
Make sure you've entered your Bluetooth PIN correctly.
Turn off Bluetooth, then turn it back on.
Make sure that your Bluetooth device is supported and fully charged.
On your Chromebook, turn off Bluetooth, then turn it back on.
Move the Bluetooth device and your Chromebook closer together.
Move your Bluetooth device away from other wireless devices and appliances.
Close browser tabs and apps you're not using.
Turn off your Chromebook, then turn it back on.
Try using the camera in another app, like Hangouts. If it works in that app, uninstall the app where it doesn't work, then reinstall it.
If the volume or brightness keys don't work, you might be at the upper or lower limit for that setting.
If the backward or forward buttons don't work, check if the same icons in a web browser window are grayed out. For example, if the back button on a webpage is gray, the browser isn't aware of a page to move backward to.
If you're having other problems with your keyboard, try these steps:
Turn off the Chromebook, then back on.
Try using the keys while you browse as a guest. If the keys work, delete the account that's having the problem on your Chromebook, then add it again.
Fixing this issue isn’t as complicated as you might think! Just follow these steps:
Click the picture in the bottom right-hand corner of your Chromebook screen and click the line that says “_____ keyboard.”
Under the options here, switch back to the US keyboard (or whatever keyboard your country uses if you’re in another country).