1
About Your System

Front-Panel Features And Indicators

Figure 1. Front-Panel Features and Indicators
Item Indicator, Button, or
Connector Icon Description
1 Diagnostic indicators The diagnostic indicators light up to display error status.
2 System health indicator The system health indicator blinks amber when a system
fault is detected.
3 Power-on indicator, power
button
The power-on indicator lights when the system power is
on. The power button controls the power supply output to
the system.
NOTE: On ACPI-compliant operating systems, turning
off the system using the power button causes the
system to perform a graceful shutdown before power
to the system is turned off.
4 NMI button Used to troubleshoot software and device driver errors
when running 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.
5 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 pressed, the system status
indicator on the back flashes until one of the buttons is
pressed again.
Press to toggle the system ID on and off.
7