Opening The Computer Cover - Lenovo THINKCENTRE 2491 Hardware Maintenance Manual

Figure 4. System board part locations
1
Thermal sensor connector
2
Memory slots (2)
3
Battery
4
Microprocessor fan connector
5
Clear CMOS (Complementary Metal Oxide
Semiconductor) /Recovery jumper
6
Internal speaker connector
7
Serial (COM2) connector
8
eSATA connector
9
SATA connector 2 (SATA 2.0 connector)

Opening the computer cover

Attention:
Do not open your computer or attempt any repair before reading and understanding the "Important safety information"
in the ThinkCentre User Guide. To obtain a copy of the ThinkCentre User Guide, go to:
http://www.lenovo.com/ThinkCentreUserGuides
This section provides instructions on how to open the computer cover.
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ThinkCentre Hardware Maintenance Manual
10
PS/2 keyboard and mouse connector
11
Front USB connector 2 (for connecting additional
USB devices)
12
Cover presence switch connector (Intrusion switch
connector)
13
PCI card slot
14
Front USB, front panel, and front audio connector
(for connecting USB ports 1 and 2 on the front bezel,
LED indicators and power switch, and microphone and
headphone connectors on the front bezel)
15
SATA connector 1 (SATA 3.0 connector)
16
System fan connector
17
4-pin power connector
18
Microprocessor