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About Your System
Front-Panel Features And Indicators
Figure 1. Front-Panel Features and Indicators
Item Indicator, Button, or
Connector
Icon Description
1 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.
2 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 if the information is
provided in the operating system documentation.
3 Video connector Allows you to connect a VGA display to the system.
4 Temperature indicator The indicator blinks amber if the system
experiences a thermal error (for example, a
temperature out of range or fan failure).
Ensure that none of the following conditions exist:
• A cooling fan is removed or has failed.
• System cover, cooling shroud, EMI filler panel,
memory-module blank, or back-filler bracket is
removed.
• Ambient temperature is too high.
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