HP Compaq Presario CQ43 Maintenance And Service Manual page 25

Item Description
(3) Part number/Product number (p/n)
(4) Warranty period
(5) Model description
Function
This number provides specific information about the
product's hardware components. The part number
helps a service technician to determine what
components and parts are needed.
This number describes the duration of the warranty
period for the computer.
This is the alphanumeric identifier used to locate
documents, drivers, and support for the computer.
Service tag 17