HP Compaq Presario,Presario 1515 Supplementary Manual page 38

There are noticeable signs of overheating.
The product does not operate normally when you follow the operating
instructions.
Except as explained elsewhere in the Compaq documentation, do not service any
Compaq product yourself. Opening or removing covers that are marked may expose
you to electric shock. Service needed on components inside these compartments
should be done by a Compaq authorized service provider.
Do not use the product on an unstable table, cart, stand, tripod, or bracket. The
product may fall, causing serious bodily injury and serious damage to the product.
Use only with a table, cart, stand, tripod, or bracket recommended by the
manufacturer, or sold with the product. Any mounting of the product should follow
the manufacturer's instructions, and should use a mounting accessory recommended
by the manufacturer.
Slots and openings in the product are provided for ventilation and should never be
blocked or covered, since these ensure reliable operation of the product and protect it
from overheating. The openings should never be blocked by placing the product on a
bed, sofa, carpet, or other similar, flexible surface. The product should not be placed
in a built-in apparatus such as a bookcase or rack unless the apparatus has been
specifically designed to accommodate the product, proper ventilation is provided for
the product, and the manufacturer's instructions have been followed.
Do not use the product in a wet location.
Some products are equipped with a three-wire electrical grounding-type plug that has
a third pin for grounding. This plug only fits into a grounded electrical outlet. This is
a safety feature. Do not defeat the safety purpose of the grounding-type plug by
trying to insert it into a non-grounded outlet. If you cannot insert the plug into the
outlet, contact your electrician to replace the obsolete outlet.