System Id Leds; Power-On Self Test (Post); Figure 3-6 Location Of Front-Panel Id Pushbutton And Led - Sun Microsystems Sun Fire V60x Manual

3.2.6

System ID LEDs

A pair of blue LEDs, one at the rear of the server, and one on the front panel, can be
used to easily identify the server when it is part of a large stack of servers. A single
blue LED located at the back edge of the server board next to the backup battery is
visible through the rear panel. The two LEDs mirror each other and can be
illuminated by the Baseboard Management Controller (BMC) either by pressing a
button on the chassis front panel or through server-management software. When the
button is pressed on the front panel, both LEDs illuminate and stay illuminated until
the button is pressed again. If the LED is illuminated through a remote System
Identify command, the LED turns off after a timeout period. See Figure 3-5 on
page 3-13 for the location of the rear Main Board LED. The front panel ID LED and
the ID activation button are shown in Figure 3-6.
Location of Front-Panel ID Pushbutton and LED
FIGURE 3-6
3.3

Power-On Self Test (POST)

The BIOS indicates the current testing phase during POST by writing a hex code to
the Enhanced Diagnostic LEDs, located on the rear of the server main board and
visible through the back of the chassis.
If errors are encountered, error messages or codes will either be displayed to the
video screen, or if an error has occurred prior to video initialization, errors will be
reported through a series of audible beep codes. POST errors are logged in to the
System Event Log (SEL).
During the power-on self test (POST), the server may indicate a system fault by:
Displaying error codes and messages at the display screen
■
Beeping the speaker in a coded sequence
■
Illuminating the POST LEDs, visible from the rear panel, in a coded fashion
■
ID LED
Chapter 3 Troubleshooting the Server Using Built-In Tools
ID Pushbutton
3-15