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3 Heat sink 9 WiFi card module
4 Microprocessor 10 Battery
5 Cover presence switch (Intrusion switch)
11 Internal speaker
6 Memory module(s)
12 Hard disk drive or solid-state drive
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 Internal speaker connector
8 System fan connector
2 Power switch board cable connector 9 Battery
3 Mini PCI Express card slot 10 Clear CMOS (Complementary Metal Oxide Semiconductor)
/Recovery jumper
4 Hard disk drive power connector 11 Microprocessor
5 SATA connector 12 Cover presence switch connector (Intrusion switch
connector)
6 Optional USB connector 13 Memory slots (2)
7 Serial (COM1) connector
12 ThinkCentre User Guide