7. Remove the two Phillips PM2.0×2.9 screws (1) that secure the power button board to the bottom cover.
8. Remove the power button board (2).
Reverse this procedure to install the power button board.
RTC battery
Description Spare part number
RTC battery (includes cable and double-sided adhesive) 716742-001
Before removing the RTC battery, follow these steps:
1. Turn off 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 the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the battery (see Battery on page 29), and then remove the following components:
a. Service cover (see Service cover on page 30)
b. Keyboard (see Keyboard on page 41)
c. Bottom cover (see Bottom cover on page 44)
Remove the RTC battery:
1. Disconnect the RTC battery cable (1) from the system board.
Component replacement procedures 49
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