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Figure 4. System board part locations
1
Microprocessor
2
Microprocessor fan connector
3
Memory slots (2)
4
Thermal sensor connector
5
24-pin power connector
6
Parallel connector
7
Battery
8
Cover presence switch connector (Intrusion switch
connector) (some models)
9
SATA connectors (3)
10
Clear CMOS (Complementary Metal Oxide
Semiconductor) /Recovery jumper
11
Power fan 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 8 "Replacing FRUs (Machine Types: 0806, 0810, 0821, 0823, 0827,
72
ThinkCentre Hardware Maintenance Manual
12
Front panel connector
13
USB connectors (2)
14
Serial (COM 2) connector
15
Front audio connector
16
Internal speaker connector
17
PCI card slots (2)
18
PCI Express x1 card slot
19
PCI Express x16 graphics card slot
20
System fan connector
21
4-pin power connector
22
PS/2 keyboard and mouse connector
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