Locating parts on the system board
1 Microprocessor fan connector 14 Front USB connectors (2)
2 Microprocessor and heat sink 15 Battery
3 Memory slot 1 16 Clear CMOS/Recovery jumper
4 Memory slot 2 17 Serial (COM) connector
5 Memory slot 3 18 PCI adapter card slots (2)
6 Memory slot 4 19 Mono (speaker) connector
7 Cover presence switch connector 20 Front audio connector
8 Diskette drive connector 21 CD-IN connector
9 IDE connector 22 PCI Express x16 graphics adapter card slot
10 Power connector 23 PCI Express x1 adapter card slot
11 Front system fan connector 24 System fan connector
12 SATA IDE connectors (4) 25 12v power connector
13 Front panel connector
Accessing the 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 the system board
components such as memory modules and battery.
Chapter 9. Replacing FRUs - Desktop computers 119
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