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Locating parts on the system board
1
CPU 1 memory slots (6)
19
Hard disk drive connectors (5)
2
Microprocessor and heat sink 1
20
Optical drive connectors (3)
3
CPU 1 fan connector
21
Battery
4
CPU 1 12 V power connector
22
Clear CMOS/Recovery jumper
5
CPU 1 memory fan connector
23
Thermal sensor connector
6
Microprocessor and heat sink 2
24
Cover presence switch connector
7
CPU 2 12 V power connector
25
PS/2 keyboard and mouse connector
8
24-pin power connector
26
Internal speaker connector
9
CPU 2 fan connector
27
COM 2 connector
10
CPU 2 memory fan connector
28
Front audio connector
11
CPU 2 memory slots (6)
29
PCI adapter card slot
12
Power switch/LEDs connector
30
PCI Express x4 graphics adapter card slot (x16
mechanical)
13
Auxiliary LED connector
31
PCI Express x16 graphics adapter card slot
14
Hard disk drive fan connector
32
PCI adapter card slot
15
Diskette drive connector
33
PCI Express x16 graphics adapter card slot
16
Card reader connector
34
PCI Express x1 adapter card slot
17
Front USB connector
35
Graphic card power connector
18
Front IEEE 1394 connector
36
Rear fan connector
Chapter 11. Replacing FRUs (Type 4155, 4158, 4218) 113