Dell OptiPlex 790 (Early 2011) - Manual (Page 4)

Ultra Small Form Factor — Front And Back View
Figure 4. Front And Back View Of Ultra Small Form Factor
1. optical drive
2. optical-drive eject button
3. power button, power light
4. drive activity light
5. diagnostic lights (4)
6. headphone connector
7. microphone connector
8. USB 2.0 connectors (2)
9. Wi-Fi antenna (optional)
10. network activity light
11. captive thumbscrew
12. padlock ring
13. security-cable slot
14. power connector
15. line-out connector
16. line-in/microphone connector
17. DisplayPort connector
18. VGA connector
19. serial connector
20. USB 2.0 connectors (5)
21. network connector
22. link integrity light
4