Dell OptiPlex 170L - Manual (Page 11)

Quick Reference Guide
11
About Your Mini-Tower Computer
Front and Back Views
USB 2.0 connectors (2)
CD or DVD drive activity light
CD or DVD eject button
floppy drive light
floppy drive eject button
hard-drive activity light
power button
power light
headphone connector
service tag
second drive bay
keyboard connector
mouse connector
serial connector
USB 2.0 connectors (4)
microphone connector
line-in connector
line-out connector
parallel connector
video connector
PCI card slots (3)
voltage selection switch
power connector
network adapter connector
diagnostic lights (4)
cover latch
security cable slot