HP Notebook - Manual (Page 9)

Startup
Turning On the Notebook
To turn on the notebook, press the power button 1. When the
notebook turns on, the power/standby light 2 turns on, and you
are prompted to begin software setup.
Turning on the notebook
If the notebook does not turn on:
Make sure that the AC adapter is securely plugged into an
electrical outlet.
Make sure that the outlet is providing power. (To confirm
that the outlet is providing power, plug another device into
the outlet.)
If you have installed a battery pack, make sure that the
battery pack is firmly seated.
Refer to the Worldwide Telephone Numbers booklet (English
only) included with the notebook to contact
Startup and Reference Guide--Part 1 1-7