Lenovo ThinkStation D20 Hardware Maintenance Manual - Page 121
Locating parts on the system board, Auxiliary LED connector
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Locating parts on the system board 1 CPU 1 memory slots (6) 2 Microprocessor and heat sink 1 3 CPU 1 fan connector 4 CPU 1 12 V power connector 5 CPU 1 memory fan connector 6 Microprocessor and heat sink 2 7 CPU 2 12 V power connector 8 24-pin power connector 9 CPU 2 fan connector 10 CPU 2 memory fan connector 11 CPU 2 memory slots (6) 12 Power switch/LEDs connector 13 Auxiliary LED connector 14 Hard disk drive fan connector 15 Diskette drive connector 16 Card reader connector 17 Front USB connector 18 Front IEEE 1394 connector 19 Hard disk drive connectors (5) 20 Optical drive connectors (3) 21 Battery 22 Clear CMOS/Recovery jumper 23 Thermal sensor connector 24 Cover presence switch connector 25 PS/2 keyboard and mouse connector 26 Internal speaker connector 27 COM 2 connector 28 Front audio connector 29 PCI adapter card slot 30 PCI Express x4 graphics adapter card slot (x16 mechanical) 31 PCI Express x16 graphics adapter card slot 32 PCI adapter card slot 33 PCI Express x16 graphics adapter card slot 34 PCI Express x1 adapter card slot 35 Graphic card power connector 36 Rear fan connector Chapter 11. Replacing FRUs (Type 4155, 4158, 4218) 113