Dell PowerEdge 1850 - Manual (Page 9)

Table 1-2. Front-Panel LED Indicators, Buttons, and Connectors
SCSI Hard-Drive Indicator Codes
Indicator, Button,
or Connector Icon Description
blue system status
indicator
The blue system status indicator lights up during normal system operation. Both the systems management software and
the identification buttons located on the front and back of the system can cause the blue system status indicator to flash
to identify a particular system.
amber system status
indicator
The amber system status indicator flashes when the system needs attention due to a problem with power supplies, fans,
system temperature, or hard drives.
NOTE: If the system is connected to AC power and an error has been detected, the amber system status indicator flashes
regardless of whether the system has been powered on.
NIC1 and NIC2 link
and activity indicators
The link and activity indicators for the two integrated NICs light intermittently when the NICs are in use.
hard-drive indicator The green hard-drive activity indicator flashes when the hard drives are in use. See Figure 1 -2 for more information on
hard-drive indicators.
power-on indicator,
power button
The power-on indicator lights when the system power is on. The power-on indicator blinks when power is available to the
system, but the system is not powered on.
The power button controls the DC power supply output to the system.
NOTE: If you turn off the system using the power button and the system is running an ACPI-compliant operating system,
the system performs a graceful shutdown before the power is turned off. If the system is not running an ACPI-compliant
operating system, the power is turned off immediately after the power button is pressed.
system identification
button
The identification buttons on the front and back panels can be used to locate a particular system within a rack. When one
of these buttons is pushed, the blue system status indicator on the front and back blinks until one of the buttons is
pushed again.
USB connectors Connects USB 2.0-compliant devices to the system.
NMI button Used to troubleshoot software and device driver errors when using certain operating systems. This button can be
pressed using the end of a paper clip.
Use this button only if directed to do so by qualified support personnel or by the operating system's documentation.
video connector Connects a monitor to the system.