HP Z230 Tower-Workstation - Manual (Page 52)

Locating identification labels
To assist in troubleshooting, product, serial, and authentication numbers are available on each
computer.
● All workstations have a serial number (unique for each workstation) and product number. Have
these numbers available when you contact support.
● The Certificate of Authentication (COA) is used for Windows 7-preinstalled systems only.
● The Genuine Microsoft Label (GML) is used for Windows 8-preinstalled systems only.
● A service label shows the build ID and Feature Byte strings, which are needed for system board
replacement.
In general, these labels can be found in the top, rear, or bottom of the chassis (tower and desktop
configuration) (your computer might look different).
Locating warranty information
To locate base warranty information, see http://www.hp.com/support/warranty-lookuptool .
To locate an existing Care Pack, see http://www.hp.com/go/lookuptool .
To extend a standard product warranty, visit http://www.hp.com/hps/carepack . HP Care Pack
Services offer upgraded service levels to extend and expand a standard product warranty.
44 Chapter 8 Diagnostics and Minor Troubleshooting