Option 1
Plug charger into chromebook.
Leave chromebook plugged in for 5-10 solid minutes.
**If chromebook is completely dead, it can take 5-10 minutes for it to regain any kind of charge. It will turn on when it has charge and then will need to stay plugged in to continue charging.
Option 2
If charged, press the power button.
Close and open lid. Should turn on at this point.