RTC battery, HP 450 models
Description Spare part number
RTC battery 738824-001
On HP 450 models, you must remove the system board to access the RTC battery.
Before removing the RTC battery, 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 the battery (see Battery on page 36).
5. Remove the following components:
a. Service doors (see Service door on page 37).
b. Hard drive (see Hard drive on page 39)
c. Optical drive (see Optical drive on page 43)
d. Keyboard (see Keyboard on page 49)
e. Top cover (see Top cover on page 58)
f. System board (see System board on page 78)
Remove the RTC battery:
1. Position the system board upside-down.
2. Using a at tool, pry the battery out of the socket (1).
Component replacement procedures 83
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