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4–6 Maintenance and Service Guide
Removal and replacement procedures
Component replacement procedures
This chapter provides removal and replacement procedures.
There are as many as 49 screws, in 9 different sizes, that must be removed, replaced, or loosened when servicing
the computer. Make special note of each screw size and location during removal and replacement.
Serial number location
The service tag, affixed to the bottom of the computer, provides information that may be needed when
troubleshooting system problems. The service tag provides the following information:
1 Product name: This is the product name affixed to the front of the computer.
2 Serial number (s/n): This is an alphanumeric identifier that is unique to each product.
3 Part number/Product number (p/n): 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.
4 Model description: This is the number used to locate documents, drivers, and support for the computer.
5 Warranty period: This number describes the duration of the warranty period for the computer.
When ordering parts or requesting information, provide the computer serial number and model description
provided on the service tag.