Dell Precision T5400 Guide De Référence Rapide page 24

7 Dell rotatable
badge
8 power button,
power light
9 headphone
connector
10 microphone
connector
11 network link light
12 diagnostic
lights (4)
24
Quick Reference Guide
To rotate the Dell badge for tower-to-desktop conversion:
remove the front panel (see "Removing the Front Panel" in your
User's Guide), turn it over, and rotate the plastic handle behind
the badge.
Press the power button to turn on the computer. The light in the
center of this button indicates power state. For more information,
see "Power Lights" on page 27.
NOTICE:
To avoid losing data, do not use the power
button to turn off the computer. Instead, perform an
operating system shutdown.
Use the headphone connector to attach headphones.
Use the microphone connector to attach a personal computer
microphone for voice or musical input into a sound or
telephony program.
The network link light is on when a good connection exists
between a 10-Mbps, 100-Mbps, or 1000-Mbps (or 1-Gbps)
network and the computer.
Use these lights to help you troubleshoot a computer problem
based on the diagnostic code. For more information, see "Power
Lights" on page 27.