Sys Bd Label Color Component Sys Bd Label Color Component
CHFAN2 Brown Rear fan connector SATA5 Light blue Any SATA Device other
than the primary hard
drive
XU1 Black Processor SATA1 Light blue Any SATA Device other
than the primary hard
drive
CPUFAN White Processor fan FRONT USB Yellow Front I/O
DIMM4 White Memory module SATA2 Light blue Any SATA Device other
than the primary hard
drive
DIMM3 Black Memory module PSWD Green Clear system passwords
DIMM2 White Memory module CMOS Yellow Reset CMOS
DIMM1 Black Memory module BAT Black RTC battery
PB/LED Black Front I/O/power switch HSENSE White Hood sensor
PWRCMD White Power supply THUNDERBOLT Black Thunderbolt connector
SATAPWR0 Black Drives FRONT AUD Blue Front I/O
74 Chapter 4 Removal and replacement procedures – Microtower (MT) chassis