Dell OptiPlex 390 (Mid 2011) - Manual (Page 2)

13. back panel connectors
14. expansion card slots (4) 15. security cable slot
16. padlock ring
Desktop — Front And Back View
Figure 2. Front And Back View Of Desktop
1. optical drive
2. optical drive eject button
3. power button
4. USB 2.0 connectors (2)
5. microphone connector
6. headphone connector
7. hard-drive activity light
8. diagnostic lights (4) 9. padlock ring
10. security cable slot
11. power cable connector
12. back panel connectors
13. expansion card slots (4)
14. power-supply diagnostic light
15. power-supply diagnostic button
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