Dell Precision R5500 (Early 2011) - Manual (Page 6)

Control Lights And Diagnostic Lights
System ID button and light blue light — flashes (front and back of
chassis) when the button is pressed. Press
the button again to turn it off.
Drive activity light blue light — blinking blue light indicates
that the computer is reading data from, or
writing data to the hard drive.
Network link integrity lights (front): blue light — A good connection exists
between the network and the computer.
off (no light) — The computer is not
detecting a physical connection to the
network.
Network link integrity lights (rear): green — A good connection at 10 Mbs
exists between the network and the
computer
orange — A good connection at 100 Mbs
exists between the network and the
computer.
amber — A good connection at 1000 Mbs
exists between the network and the
computer.
Network activity lights amber — flashes when there is network
activity on the connection.
Diagnostic lights: off — computer is off or has completed
POST.
amber/blinking — see the service manual
for specific diagnostic codes.
Power
Coin-cell battery 3 V CR2032 lithium coin cell
Voltage 100 V to 240 V, 12.00 A to 6.00 A, 50 Hz to 60
Hz
Wattage 1023 W on 100 VAC to 120 VAC, 1100 W on
200 VAC to 240 VAC
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