HP Notebook Reference Manual page 7

Connecting the Notebook to External Power
To connect the notebook to external AC power:
1. Plug the AC adapter cable into the power connector 1.
2. Plug the power cord into the AC adapter 2, then into an
electrical outlet 3.
When the notebook is receiving external power, the battery light
4 turns on.
Connecting the notebook to external power (Power cords and
outlets vary by region and country.)
Startup and Reference Guide--Part 1
Startup
1-5