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Component replacement procedures
This chapter provides removal and replacement procedures.
There are as many as 114 screws that must be removed, replaced, or loosened when servicing
the computer. Make special note of each screw size and location during removal and replacement.
Service cover
Description Spare part number
Service cover 725453-001
Before disassembling the computer, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn
the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet
and then unplugging the AC adapter from the computer.
Remove the service cover:
1. Position the computer face down, and then remove the 4 smaller Phillips screws from the front
edge of the service cover.
30 Chapter 4 Removal and replacement procedures