Top cover
Description Spare part number
Top cover 821173-001
Before removing the top cover, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o 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 rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove all other components.
Reverse this procedure to install the top cover.
56 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts