HP ProDesk 400 G2 system board callouts
Sys Bd Label
COMB
PWRCPU
Processor
CMOS
CPUFAN
DIMM3
DIMM1
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Chapter 5 Removal and replacement procedures: Microtower
Sys Bd
Color
Component
Connector
Serial Port
Black
Optional second
serial port
Processor
White
4-pin processor
power
power
connector
Processor
Silver
Processor
socket
CMOS button
Yellow
Reset CMOS
Processor fan
White
Processor fan
connector
DIMM3
White
Memory module
(Channel B)
DIMM1
White
Memory module
(Channel A)
Sys Bd Label
Sys Bd
Connector
BAT
Battery
socket
MEDIA
External
media
connector
FRONT USB
not used
SPKR
Speaker
connector
FRONT AUD
Front I/O
X1PCIEXP3
PCI Express x1 Black
X1PCIEXP2
PCI Express x1 Black
Color
Component
Black
RTC battery
Black
External media
device
Blue
not used
White
Speaker
Blue
Front I/O/power
switch
Expansion card
Expansion card