System board callouts
Sys Bd Label
Color
Component
Sys Bd Label
Color
Component
X1PCIEXP3
Black
Expansion card
PWRCMD
White
Power supply
X1PCIEXP2
Black
Expansion card
SATAPWR0
Black
Drives
X1PCIEXP1
Black
Expansion card
PWR
White
6-pin main power
X16PCIEXP
White
Expansion card
SPKR
White
Speaker
COMB
Black
Optional second serial
port
FRONT USB3.0
Blue
Front I/O/power switch
HLCK
Black
Hood lock
SD RDR
Black
Card reader
CHFAN2
Black
Rear fan connector
SATA0
Dark blue
Hard drive
PWRCPU
White
4-pin processor power
SATA1
Light blue
Any SATA Device other
than the primary hard
drive
52
Chapter 4 Removal and replacement procedures – Microtower (MT) chassis