HP 25 Owner's Handbook Manual page 111

Accessories, Service, and Maintenance
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applicable service facility listed on the Service Card. During
warranty, the service facility will, in turn , ship the unit back to
the customer prepaid, via the fastest economical means.
On out-of-warranty repairs, the customer will pay shipping
charges both ways.
Malfunctions traced to the calculator , batteries , or battery
charger require that you return the following to us:
Calculator with all standard accessories.
Completed
Service Card .
Send returned items safely packaged to the address shown on
the Service Card.
Under normal conditions, calculators will be repaired and re-
shipped within five (5) working days of receipt at any Hewlett-
Packard Service Facility listed on the Service Card.
Should other problems or questions arise regarding service ,
please call your nearest Hewlett- Packard sales or service facility.