Chapter 5
Troubleshooting
Identifying and Diagnosing Hardware Problems
121
• If an iLO MP is installed, the boot process will be monitored by the iLO MP. The diagnostic LEDs are
disabled. See Figure 5-2 for more information.
Figure 5-2 Diagnostic LEDs
The pattern of illuminated LEDs may be used to identify the category of the fault or warning. For example, if
diagnostic LED one is red, there is a problem with memory. However, if diagnostic LEDs one and two are both
red, there is a problem with the server processor.
If the diagnostic LEDs indicate an error, check the EFI shell command line interface (CLI) cli>sl e to display
the SEL for a more detailed explanations of the failure.
• The server LED indicates the severity of the error. Check the server LED before proceeding to analyze the
sequence of diagnostic LEDs:
• System LED blinking YELLOW indicates a WARNING.
• System LED blinking RED indicates a FAULT.
• The diagnostic LEDs provide details about the specific error:
• Solid red indicates the failing part or subsystem.
• Off or solid green diagnostic LEDs provide additional details about the failure.
The faults and warnings fall into several general categories. See Table 5-4 for more information.
Table 5-4 Diagnostic LEDs Fault and Warning Categories
LED1 LED2 LED3 LED4 Category
RED
Any
a
Any
a
Any
a
Memory
Any
a
RED
Any
a
Any
a
Firmware
Any
a
Any
a
RED
Any
a
System Board
Any
a
Any
a
Any
a
RED Fan
1 2 3 4 LAN System
System
LED
Power On/Off
LED
Power On/Off
Button
Diagnostics
LEDs
LAN
LED
Locator
Button and
LED
LED 4
LED 1
LED 3
LED 2
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