12 About Your System
Front-Panel Features and Indicators
Figure 1-1. Front-Panel Features and Indicators
Item Indicator, Button, or 
Connector
Icon Description
1Power-on indicator/ 
power button
The power-on indicator lights when the 
system power is on.
The power button controls the DC 
power supply output to the system. 
When the system bezel is installed, the 
power button is not accessible.
NOTE: When powering on the system, the 
video monitor can take from several 
seconds to over 2 minutes to display an 
image, depending on the amount of 
memory installed in 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.
2 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.
book.book  Page 12  Monday, March 7, 2011  2:24 PM