Lenovo Personal Computer 4263 User Manual Page 19

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Locating parts and connectors on the system board
Note: Your computer comes with one of the following system boards.
Figure 4 shows the locations of the parts and connectors on one type of system
board.
1 CPU 1 memory slots (6) 19 Clear CMOS (Complementary Metal Oxide
Semiconductor) /Recovery jumper
2 CPU 1 memory fan connector 20 Thermal sensor connector
3 CPU 2 12 V power connector 21 Cover presence switch connector
4 Microprocessor 2 22 Personal System/2
®
(PS/2
®
) keyboard and
mouse connector
5 24-pin power connector 23 Internal speaker connector
6 CPU 2 fan connector 24 Front audio connector
7 CPU 2 memory fan connector 25 PCI card slot
8 CPU 2 memory slots (6) 26 PCI Express x4 card slot (x16 mechanical)
9 Power switch and LEDs connector 27 PCI Express x16 card slot
10 Auxiliary LED connector 28 PCI card slot
11 Right rear fan connector 29 PCI Express x16 card slot
12 Front fan connector 30 PCI Express x1 card slot
13 Card reader connector 31 Auxiliary 12 V power connector
14 Front USB connector 32 Left rear fan connector
15 Front IEEE 1394 connector 33 CPU 1 12 V power connector
16 Hard disk drive connectors (5) 34 CPU 1 fan connector
17 Optical drive connectors (3) 35 Microprocessor 1
18 Battery
33
32
31
34
35
Figure 4. System board part and connector locations
Chapter 1. Product overview 11
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