HP 640 ProBook G3 Series Maintenance And Service Manual page 59

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 following components:
a. Service door (see
b. Battery (see Battery on page
c. Hard drive (see
d. Solid-state drive (see
e. WWAN module (see
f. WLAN module (see
g. Optical drive (see
h. Keyboard (see
▲ If you are replacing a memory module, remove the existing memory module:.
▲ Pull away the retention clips (1) on each side of the memory module.
The memory module tilts up.
▲ Grasp the edge of the memory module (2), and then gently pull the memory module out of the
memory module slot.
CAUTION: To prevent damage to the memory module, hold the memory module by the edges only. Do
not touch the components on the memory module.
To protect a memory module after removal, place it in an electrostatic-safe container.
To install a memory module:
CAUTION: To prevent damage to the memory module, hold the memory module by the edges only. Do not
touch the components on the memory module.
1. Align the notched edge (1) of the memory module with the tab in the memory module slot.
Service door on page
38).
Hard drive on page 39).
Solid-state drive (select products only) on page
WWAN module (select products only) on page
WLAN module on page
Optical drive on page
Keyboard on page 47).
37).
43).
45).
Component replacement procedures
41).
42).
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