Lenovo D400 Desktop IdeaCentre - Manual (Page 57)

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Chapter 7. Replacing hardware
SATA, fan and LED cables
I/O LED, USB, and switch cables
No. Cable No. Cable
1 SATA 1 cable 5 HDD status LED cable
2 SATA 2 cable 6 Fan cable
3 SATA 3 cable 7 Backplane LED cable
4 SATA 4 cable
No. Cable
1 Front USB port cable
2 I/O LED cable
3 Switch cable