HP ProBook 640 G1 Maintenance And Service Manual page 111

g. Base enclosure (see
h. USB board (see
NOTE: When replacing the system board, be sure that the following components are removed from the
defective system board and installed on the replacement system board:
● WWAN module (see
●
Solid-state drive (see
● WLAN module (see
●
Expansion memory (see
● Primary memory (see
●
Smart card reader (see
● Processor (see Processor on page
Remove the system board:
1. Disconnect the following cables from the system board:
(1) Card reader cable
(2) Power connector cable
Left (3) and right (4)speaker cables
(5) Display panel cable (if display panel is still attached)
Base enclosure on page
USB board on page 94)
WWAN module (select models only) on page
Solid-state drive on page
WLAN module on page 75)
Primary memory module on page
Expansion memory module on page
Smart card reader on page
109)
91)
74)
79)
69)
72)
100)
System board 103