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4 Front audio and USB assembly
9 Power supply assembly
5 PCI card (installed in some models)
Locating parts on the system board
Figure 4 “System board parts locations” on page 10 shows the locations of the parts on the system board.
Figure4. System board parts locations
1 4-pin power connector 15 Front panel connector
2 Microprocessor
16 Clear CMOS (Complementary Metal Oxide Semiconductor)
/Recovery jumper
3 Microprocessor fan connector
17 Front USB connectors (2)
4 Memory slot 2
18 Serial (COM2) connector
5 Memory slot 1 19 Front audio connector
6 Memory slot 4 20 Internal speaker connector
7 Memory slot 3
21 PCI card slots (2)
8 Thermal sensor connector
22 PCI Express x1 card slot
9 24-pin power connector
23 PCI Express x16 graphics card slot
10 Diskette drive connector
24 System fan connector
11 Parallel connector
25 Cover presence switch connector (Intrusion switch
connector)
12 SATA connectors (3)
26 Battery
10 ThinkCentre User Guide