1. Position the removed system board upright.
2. Disconnect the RTC battery (1), and then lift to remove it (2).
Reverse this procedure to install the RTC battery.
Power connector
Description Spare part number
Power connector cable 858021-001
IMPORTANT: Make special note of each screw and screw lock size and location during removal
and replacement
Before removing the power connector, follow these steps:
1. Shut down the computer.
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 the base enclosure (see Base enclosure on page 32), and then remove the following
components:
a. Hard drive (see Hard drive on page 37).
b. Battery (see Battery on page 34).
c. Fans (see Fans on page 51).
d. System board (see System board on page 53).
Remove the power connector:
56 Chapter 5 Removal and replacement procedures for authorized service provider parts
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