HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PC

3 Illustrated parts catalog
Serial number label location
When ordering parts or requesting information, the serial number label, located on the bottom of the
computer, provides important information that you may need when contacting technical support.
(1) Product name (4) Warranty period
(2) Serial number (5) Model description (select models)
(3) Product number
22 Chapter 3 Illustrated parts catalog