6 hard-drive activity light
7 microphone connector
8 headphone connector
9 optical-drive eject button (optional)
10 optical drive (optional)
11 line-in/microphone connector
12 serial connector
13 power supply unit (PSU) release latch
14 power cable connector
15 hard-drive access cover release latch
16 USB 3.0 connectors
17 USB 2.0 connectors
18 expansion card slots
19 security cable slot
20 padlock ring
21 line-out connector
22 network connector
23 PS/2 Keyboard connector
24 PS/2 Mouse connector
25 active expansion card slots
26 mechanical slot
8
Removing and installing components