1. Make sure the power cable and adapter that were provided with the Chromebook are being used to charge it. Substitute cables by other manufacturers may deliver either more or less power than the Chromebook is engineered for.
2. Verify the power cable and adapter are securely plugged in to a wall outlet.
3. Try charging from a different outlet or location.
4. Is the charging port LED indicator illuminated? A green light indicates a full charge, while an orange light indicates the Chromebook is in the process of charging. If the charging LED is not illuminated, the Chromebook is not charging.
5. Try a hard reboot of the Chromebook while plugged in. This may resolve any battery software issues. To perform a hard reboot, press the refresh key and power key at the same time.
6. Swap out the power cable and adapter for another one.
7. If all other suggestions fail, contact Lenovo Service for support. Possible causes of a failure to charge include a bad battery, a bad motherboard, or bad software.