Locating ID labels
To assist in troubleshooting, product, serial, and authentication numbers are available on each computer.
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All workstations have a serial number (unique for each workstation) and product number. Have these
numbers available when you contact support.
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The Certificate of Authentication (COA) is used only for systems with Windows 7 preinstalled.
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The Genuine Microsoft Label (GML) is used only for systems with Windows 8 preinstalled.
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A service label shows the build ID and Feature Byte strings, which are needed for system board
replacement.
The all-in-one service label can be found in the location shown in the figure below (pull-out card).
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.
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Chapter 4 Diagnostics and troubleshooting