HP ProDesk 400 G2 system board callouts
Sys Bd Label Sys Bd
Connector
Color
Component
Sys Bd Label Sys Bd
Connector
Color
Component
COMB
Serial Port
Black
Optional second
serial port
BAT
Battery
socket
Black
RTC battery
PWRCPU
Processor
power
connector
White
4-pin processor
power
MEDIA
External
media
connector
Black
External media
device
Processor
Processor
socket
Silver
Processor
FRONT USB
not used
Blue
not used
CMOS
CMOS button
Yellow
Reset CMOS
SPKR
Speaker
connector
White
Speaker
CPUFAN
Processor fan
connector
White
Processor fan
FRONT AUD
Front I/O
Blue
Front I/O/power
switch
DIMM3
DIMM3
(Channel B)
White
Memory module
X1PCIEXP3
PCI Express x1 Black
Expansion card
DIMM1
DIMM1
(Channel A)
White
Memory module
X1PCIEXP2
PCI Express x1 Black
Expansion card
68
Chapter 5 Removal and replacement procedures: Microtower