System board callouts
Sys Bd Label
Color
Component
Sys Bd Label
Color
Component
XU1
Silver
Processor
SATA1
Light blue
Any SATA Device other
than the primary hard
drive
PWRCPU
White
4-pin processor power
SPKR
White
Speaker
CPUFAN
Red
Processor fan
SD RDR
Black
Card reader
DIMM3
Black
Memory module
PSWD
Green
Clear system passwords
DIMM1
Black
Memory module
X16PCIEXP
Black
Expansion card
BAT
Black
RTC battery
X1PCIEXP1
Black
Expansion card
PB/LED
Black
Power switch
FRONT AUD
Blue
Front I/O
PWR
White
24-pin main power
FRONT USB3.0
Blue
Front I/O
CHFAN
Black
Rear fan connector
CMOS
Yellow
Reset CMOS
SATA0
Dark blue
Hard drive
46
Chapter 4 Removal and replacement procedures: Small Form Factor