Maintenance and Service Guide

System board connections
Refer to the following illustration and table to identify the system board connectors for your model.
Item Label Component Item Label Component
(1) PWRCPU 4-pin processor power (9) PWR Power supply
(2) CPU_FAN Processor fan (10) M2_WIFI WLAN module
(3) DIMM1 Memory module (11) PCI PCI expansion card
(4) DIMM2 Memory module (12) X1PCIEXP1 PCIe ×1 expansion card
(5) BAT RTC battery (13) X16PCIEXP PCIe ×16 expansion card
(6) SATA1 Any SATA device other than
the primary hard drive
(14) CLR_CMOS/
PSWD
Clear system passwords
(7) SATA0 Primary hard drive (15) PROCESSOR Processor
(8) SATAPWR Drive power
18 Chapter 4 Removal and replacement procedures