User manual Dell Personal Computer R820

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1
About Your System  
Front-Panel Features And Indicators  
Figure 1. Front-Panel Features And Indicators—16 Hard Drive System  
Item  
1
Indicator, Button, or  
Connector  
Icon  
Description  
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
3
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.  
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 LCD panel on  
the front and the system status indicator on the back  
flashes blue until one of the buttons is pressed again.  
Press to toggle the system ID on and off. If the system  
stops responding during POST, press and hold the system  
ID button for more than five seconds to enter BIOS  
progress mode.  
To reset iDRAC (if not disabled in F2 iDRAC setup) press  
and hold the button for more than 15 seconds.  
4
Video connector  
Allows you to connect a VGA display to the system.  
9

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