
System board callouts
Sys Bd Label Color Component Sys Bd Label Color Component
PWRCPU White 4-pin processor power SPKR White Speaker
XU1 Silver Processor SSD2 Black M.2 solid-state drive
CPUFAN White Processor fan SSD1 Black M.2 solid-state drive
DIMM4 White Memory module PWR White 6-pin main power
DIMM3 Black Memory module PWRCMD White Power supply
DIMM2 White Memory module PSWD Green Clear system passwords
DIMM1 Black Memory module X4PCIEXP Black Expansion card
CMOS Yellow Reset CMOS X1PCIEXP1 Black Expansion card
BAT Black RTC battery X1PCIEXP2 Black Expansion card
WIRELESS Black WLAN X16PCIEXP White Expansion card
SATA PWR Black Drives COMA Black Optional second serial port
SATA0 Dark blue Hard drive HSENSE White Hood sensor
SATA2 Light blue Any SATA Device other
than primary hard drive
CHFAN2 Brown Fan
SATA1 Light blue Any SATA Device other
than primary hard drive
HLCK Black Hood lock
SD RDR Black Card reader COMM_DP Silver Option port
64 Chapter 4 Removal and replacement procedures
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