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Locating parts on the system board
Figure 4 “System board part locations” on page 71 shows the locations of the parts on the system board.
Figure 4. System board part locations
1 4-pin power connector
14 Front panel connector for power switch and LED indicators
2 Microprocessor fan connector
15 Front USB connector 1 (for connecting USB port 1 and 2
on the front bezel)
3 Memory slot 1 (DIMM1) 16 Front USB connector 2 (for connecting additional USB
devices)
4 Memory slot 2 (DIMM2) 17 Clear CMOS (Complementary Metal Oxide Semiconductor)
/Recovery jumper
5 Memory slot 3 (DIMM3)
18 Internal speaker connector
6 Memory slot 4 (DIMM4) 19 Front audio connector (for connecting the microphone and
headphone connectors on the front bezel)
7 Thermal sensor connector
20 PCI card slots (2)
8 24-pin power connector
21 PCI Express x1 card slot
9 Battery
22 PCI Express x16 graphics card slot
10 SATA connectors 1 and 2 (SATA 3.0
connectors)
23 Rear fan connector
11 SATA connector 3 (SATA 2.0 connector) 24 Cover presence switch connector (Intrusion switch connector)
12 eSATA connector
25 Microprocessor
13 Front fan connector
26 PS/2 keyboard and mouse connector
Chapter 9. Replacing FRUs 71