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4–54 Maintenance and Service Guide
Removal and replacement procedures
RTC battery
Before removing the RTC battery, 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 4-7).
5. Remove the following components:
a. Hard drive (see “Hard drive” on page 4-9)
b. Memory/wireless module compartment cover (see “WLAN module” on page 4-12)
c. Optical drive (see “Optical drive” on page 4-18)
d. Keyboard and switch cover (see “Keyboard and switch cover” on page 4-20)
e. Palm rest (see “Palm rest” on page 4-25)
f. Display assembly (see “Display assembly” on page 4-27)
g. Top cover (see “Top cover” on page 4-36)
h. System board (see “System board” on page 4-47)
Remove the RTC battery:
1. Turn the system board upside down, with the audio connectors toward you.
2. Disconnect the RTC battery cable 1 from the system board.
3. Detach the RTC battery 2 from the SD Card Reader. (The RTC battery is attached to the SD Card Reader with
double-sided tape.)
Reverse this procedure to install the RTC battery.
Description Spare part number
RTC battery 581926-001