System board callouts, EliteDesk 800, ProDesk 600, and HP MP9 Retail System
Sys Bd Label Color Component Sys Bd Label Color Component
SPKR White Speaker connector HDD_FAN White Secondary hard drive
HSENSE White Hood sensor connector SATA Blue Hard drive data
connector
THERM White Thermal sensor COMM_DP White Expansion board
connector
SSD Black Solid-state module
socket
XU1 Black Processor socket
WLAN Black WLAN module socket DIMM3 Black Secondary memory
socket
BAT Black RTC battery DIMM1 Black Primary memory socket
PSWD Black/blue Password header and
jumper
CPUFAN White Fan connector
CMOS Yellow CMOS reset button
System board 51