Back View (Tower Orientation) - Dell Precision 390 User Manual

plastic handle behind the badge.
9 power button Press to turn on the computer.
NOTICE: To avoid losing data, do not use the power button to turn off
the computer. Instead, perform an operating system shutdown.
NOTE: The power button can also be used to wake the system or to
place it into a power-saving state. See
information.
10 power light The power light illuminates and blinks or remains solid to indicate
different states:
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To exit from a power-saving state, press the power button or use the
keyboard or the mouse if it is configured as a wake device in the
Windows Device Manager. For more information about sleep states and
exiting from a power-saving state, see
See Diagnostic Lights
troubleshoot problems with your computer.
11 microphone Use the microphone connector to attach a personal computer
connector microphone for voice or musical input into a sound or telephony
program.
12 headphone Use the headphone connector to attach headphones.
connector
13 diagnostic Use these lights to help you troubleshoot a computer problem based
lights (4) on the diagnostic code. For more information, see
14 network link The network link light is on when a good connection exists between a
light 10-Mbps, 100-Mbps, or 1000-Mbps (1-Gbps) network and the computer.
Back View (Tower Orientation)
1 power Insert the power cable.
connector
2 voltage See the safety instructions in the Product Information Guide for more
selection information.
switch
3 back panel Plug serial, USB, and other devices into the appropriate connector.
connectors
4 card slots Access connectors for any installed PCI or PCI Express cards.
NOTE: The upper five connector slots support full-length cards; the
connector slot at the bottom supports a half-length card.
Power Management
No light — The computer is turned off.
Steady green — The computer is in a normal operating
state.
Blinking green — The computer is in a power-saving state.
Blinking or solid amber — See Power
Power Management.
for a description of light codes that can help you
for more
Problems.
Diagnostic Lights.