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Disengage the power connector cable (1) from the tabs, remove the 4 screws (2), and then
remove the rear speakers (3).
Reverse this procedure to install the rear speakers.
Power button board
Description Spare part number
Power button board (includes cable) 720250-001
Before removing the Power button board, 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.
4. Remove the battery (see
Battery on page 33),
5. Remove the display panel (see
Display panel on page 45).
6. Remove the service cover (see
Service cover on page 34).
7. Remove the hard drive (see
Hard drive on page 34).
8. Remove the RTC battery (see RTC battery (see
RTC battery on page 49).
9. Remove the memory modules (see
Memory modules on page 37).
Component replacement procedures 79
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