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4
Microprocessor and heat sink
18
Front USB 2 connector
5
Memory connector 1
19
Clear CMOS jumper
6
Memory connector 2
20
Front USB 1 connector
7
Memory connector 3
21
COM 2 connector
8
Memory connector 4
22
COM 1 connector
9
24-pin power connector
23
CD-IN connector
10
Thermal sensor connector
24
Front audio connector
11
Diskette drive connector
25
PCI adapter connectors (2)
12
Intrusion switch connector
26
PCI Express x16 adapter connector
13
SATA connector
27
PCI Express x1 adapter connector
14
SATA connectors (3)
28
Battery
Accessing system board components and drives
Attention
Do not open your computer or attempt any repair before reading and understanding the "Important safety information"
in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkCentre
Safety and Warranty Guide, go to:http://www.lenovo.com/support
You might need to remove the drive bay assembly to access system board components such as memory,
the battery, and CMOS.
To access system board components and the drives:
1. Remove the computer cover. See "Removing the cover" on page 94.
2. Remove the front bezel by releasing the three tabs and pivoting the bezel forward to remove completely.
3. In some models, you might have to remove the PCI adapter card in order to gain access to the battery.
96 ThinkCentre Hardware Maintenance Manual