HP ProBook 440 Notebook PC and HP ProBook 445 G2 Notebook PC - Maintenance and Service Guide

RTC battery, HP 440 models
Description Spare part number
RTC battery 759981-001
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 53)
f. System board (see System board on page 72)
Remove the RTC battery:
1. Position the system board upside-down.
2. Disconnect the cable from the system board connector (1).
Component replacement procedures 77