Sys Bd Label Sys Bd
Connector
Color Component Sys Bd Label Sys Bd
Connector
Color Component
PWRCPU Processor
power
connector
White 4-pin processor
power
PB/LED Front I/O Black Front I/O/power
switch
COMB Serial Port Black Optional second
serial port
MEDIA External
media
connector
Black External media
device
Processor Processor
socket
Silver Processor FRONT USB not used Blue not used
CPUFAN Processor fan
connector
White Processor fan CMOS CMOS button Yellow Reset CMOS
DIMM3 DIMM3
(Channel B)
White Memory module PCI1 PCI slot White Expansion card
DIMM1 DIMM1
(Channel A)
White Memory module X1PCIEXP2 PCI Express x1 Black Expansion card
PWR Power
connector
White 24-pin main
power connector
X1PCIEXP1 PCI Express x1 Black Expansion card
BAT Battery
socket
Black RTC battery X16PCIEXP PCI Express
x16
Black Expansion card
FRONT
USB3.0
Front I/O Blue Front I/O/power
switch
CHFAN2 Chassis fan
connector
Red Rear chassis fan
SPKR Speaker
connector
White Speaker IN/OUT Input and
output jacks
Silver Headphone and
microphone jacks
PSWD Password
jumper
Green Clear system
passwords
FRONT AUD Front I/O Blue Front I/O/power
switch
SATA4 SATA 2.0 Light
blue
Optical drive DVI/VGA Display
connectors
Silver DVI and VGA
connectors
SATA5 SATA 2.0 White Optical Drive USB USB ports Silver USB ports
SATA1 SATA 3.0 Light
blue
Secondary hard
drive
RJ45/USB Network/USB
port
Silver Network
connector and
USB ports
SATA0 SATA 3.0 Dark
blue
Primary Hard
Drive
SERIAL Serial port Silver Integrated serial
port
PAR Parallel port Black Optional parallel
port
PS2 PS/2
connector
Silver Mouse and
keyboard
70 Chapter 5 Removal and replacement procedures: Microtower