HP Compaq Presario,Presario 5116 Quick Start Manual page 150

This equipment has been tested and found to comply with the
limits for a Class B digital device pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential
installation. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful
interference to radio communications. However, there is no
guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to
radio or television reception (which can be determined by
turning the equipment off and on), the user is encouraged to try
to correct the interference by taking one or more of the
following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and the
receiver.
Connect the equipment and the receiver to outlets that are on
different circuits.
Consult the dealer or an experienced radio or television
technician for help.