HP ProBook 6550b HP ProBook 6455b, 6555b, 6450b,and 6550b Notebook PCs - Maint - Page 155

RTC battery see, Processor see

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i. TouchPad (see TouchPad on page 109) j. Display assembly (see Display assembly on page 118) k. Top cover (see Top cover on page 130) l. ExpressCard assembly (see ExpressCard assembly on page 135) m. Speaker assembly (see Speaker assembly on page 139) n. Card reader/USB board (see Card reader/USB board on page 143) 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: ● SIM (see SIM on page 80) ● Expansion and primary memory modules (see Primary memory module on page 100 and Expansion memory module on page 86) ● WLAN module (see WLAN module on page 88) ● WWAN module (see WWAN module on page 92) ● RTC battery (see RTC battery on page 102) ● Processor (see Processor on page 116) ● Modem module (see Modem module on page 137) ● Bluetooth module cable (see Bluetooth module cable on page 141) Remove the system board: 1. Disconnect the following cables: ● Bluetooth module cable (1) from the system board ● Modem module cable (2) from the modem module ● External monitor cable (3) from the system board Component replacement procedures 147

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i.
TouchPad (see
TouchPad
on page
109
)
j.
Display assembly (see
Display assembly
on page
118
)
k.
Top cover (see
Top cover
on page
130
)
l.
ExpressCard assembly (see
ExpressCard assembly
on page
135
)
m.
Speaker assembly (see
Speaker assembly
on page
139
)
n.
Card reader/USB board (see
Card reader/USB board
on page
143
)
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:
●
SIM (see
SIM
on page
80
)
●
Expansion and primary memory modules (see
Primary memory module
on page
100
and
Expansion memory module
on page
86
)
●
WLAN module (see
WLAN module
on page
88
)
●
WWAN module (see
WWAN module
on page
92
)
●
RTC battery (see
RTC battery
on page
102
)
●
Processor (see
Processor
on page
116
)
●
Modem module (see
Modem module
on page
137
)
●
Bluetooth module cable (see
Bluetooth module cable
on page
141
)
Remove the system board:
1.
Disconnect the following cables:
●
Bluetooth module cable
(1)
from the system board
●
Modem module cable
(2)
from the modem module
●
External monitor cable
(3)
from the system board
Component replacement procedures
147