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Locating parts on the system board
1
Microprocessor 12 V power connector
16
Front panel connector
2
Microprocessor fan connector
17
Cover presence switch connector
3
Microprocessor
18
Thermal sensor connector
4
Memory slots (6)
19
PS/2 connector
5
24-pin system power connector
20
Front audio connector
6
Hard disk drive fan assembly connector
21
Internal speaker connector
7
Diskette drive connector
22
PCI adapter card slot
8
Card reader connector
23
PCI Express x1 adapter card slot
9
Front USB connector
24
PCI Express x16 graphics adapter card slot
10
SATA connectors (5)
25
PCI Express x4 adapter card slot
11
Adapter card fan connector
26
PCI Express x16 graphics adapter card slot
12
SAS (Serial Attached SCSI) LED connector
27
Second COM port connector
13
Battery
28
Rear fan assembly connector
14
Clear CMOS/Recovery jumper
29
Auxiliary 12 V power connector
15
Auxiliary LED connector
Chapter 10. Replacing FRUs (Type 4105, 4157, 4217) 81