Temperature - HP Pavilion DV4000 Hardware And Software Manual

Notebook Care
Use your notebook only on a solid, flat surface. Make sure
that the vents, which cool internal components, are
unobstructed.
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If the notebook will be unused for a week or more, turn it off.
If the notebook will be disconnected from external power for
more than 2 weeks:

Temperature

Å
WARNING: The notebook is designed to run demanding applications
at full power. As a result of increased power consumption, it is normal
for the notebook to feel warm or hot when used continuously. To avoid
potential discomfort or burns, do not block the air vents or use the
notebook on your lap for extended periods. The notebook complies with
the user-accessible surface temperature limits defined by the
International Standard for Safety of Information Technology Equipment
(IEC 60950).
15–2
To prevent overheating, do not obstruct the vents. Do not
allow a hard surface, such as an adjoining optional printer,
or a soft surface, such as fabric or carpet, to block the
airflow.
Shut down the notebook.
Remove all battery packs and store them in a cool, dry
place.
Hardware and Software Guide