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Locating parts on the system board
Figure 4 “System board part locations” on page 12 shows the locations of the parts on the system board.
Figure 4. System board part locations
1 Microprocessor
14 Front panel connector (for connecting LED indicators and
power switch)
2 Microprocessor fan connector
15 Front USB connector 1 (for connecting USB ports 1 and 2
on the front bezel)
3 Memory slot 1 (DIMM1) 16 Front USB connectors 2 and 3 (for connecting additional
USB devices)
4 Memory slot 2 (DIMM3) 17 Cover presence switch connector (Intrusion switch
connector)
5 Memory slot 3 (DIMM2) 18 Serial (COM2) connector
6 Memory slot 4 (DIMM4)
19 Internal speaker connector
7 Thermal sensor connector 20 Front audio connector
8 24-pin power connector
21 PCI card slot
9 Clear CMOS (Complementary Metal Oxide
Semiconductor) /Recovery jumper
22 PCI Express x1 card slots (2)
10 Battery
23 PCI Express x16 graphics card slot
11 Power fan connector
24 System fan connector
12 Parallel connector
25 PS/2 keyboard and mouse connector
13 SATA 3.0 connectors (4)
26 4-pin power connector
12 ThinkCentre User Guide