Locating ID 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
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these numbers available when you contact support.
The Certificate of Authentication (COA) is used for Windows 7-preinstalled systems only.
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The Genuine Microsoft Label (GML) is used for Windows 8-preinstalled systems only.
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A service label shows the build ID and Feature Byte strings, which are needed for system board
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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).
Figure 8-1
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.
HP troubleshooting resources and tools
This section provides information on HP Support Assistant (HPSA), online support, and helpful hints for
troubleshooting.
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Chapter 8 Diagnostics and Minor Troubleshooting
Tower and desktop label locations