HP ProBook 640 G2 Notebook PC, HP ProBook 645 G2 Notebook PC, HP ProBook 650 G2 Notebook PC and HP ProBook 655 G2 Notebook PC - Maintenance and Service Guide

IMPORTANT: Make special note of each screw and screw lock size and location during removal and
replacement
Before removing the RTC battery, follow these steps:
1. Shut down the computer.
2. Disconnect all external devices connected to the computer.
3. Remove the following components:
a. Service door (see Service door on page 37).
b. Remove the battery (see Battery on page 38)
c. Hard drive (see Hard drive on page 39).
d. Solid-state drive (see Solid-state drive (select products only) on page 41).
e. WWAN module (see WWAN module (select products only) on page 42).
f. WLAN module (see WLAN module on page 44).
g. Optical drive (see Optical drive on page 46).
h. Keyboard (see Keyboard on page 48).
i. Hinge covers (see Hinge cover on page 55).
j. Base enclosure (see Base enclosure on page 57).
k. System board (see System board on page 59).
l. Fan/heat sink assembly (see Fan and heat sink assembly on page 61).
m. Top cover (see Top cover and TouchPad on page 65).
To remove the RTC battery:
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If not already disconnected, disconnect the cable, and then remove the RTC battery.
Component replacement procedures 69