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Figure 4. System board part locations
1 Microprocessor
11 Cover presence switch connector (also called intrusion
switch connector)
2 Microprocessor fan connector
12 Front USB connector
3 Memory slots (4) 13 Serial (COM 2) connector
4 Thermal sensor connector
14 PCI card slot
5 24-pin power connector
15 Power fan connector
6 Battery 16 Internal speaker connector
7 Clear CMOS (Complementary Metal Oxide
Semiconductor) /Recovery jumper
17 Front audio connector
8 SATA connectors (4) 18 PCI Express x1 card slots (2)
9 Front panel connector
19 PCI Express x16 graphics card slot
10 Front USB connector 20 System fan connector
21 4-pin power connector
Locating internal drives
Internal drives are devices that your computer uses to read and store data. You can add drives to your
computer to increase storage capacity and enable your computer to read other types of media. Internal
drives are installed in bays. In this manual, the bays are referred to as bay 1, bay 2, and so on.
When installing or replacing an internal drive, it is important to note the type and size of the drive that you
can install or replace in each bay and correctly connect the cables to the drive installed. Refer to the
appropriate section in Chapter 2 “Installing or replacing hardware” on page 13
for instructions on how to
install or replace internal drives for your computer.
Figure 5 “Drive bay locations” on page 11
shows the locations of the drive bays in your computer.
10 ThinkCentre User Guide