7.Intel® Light-Guided Diagnostics

The server boards have several on-board diagnostic LEDs to assist in troubleshooting boardlevel issues. This section provides a description, location and function of each LED on the server board. For a more detailed description of what drives the diagnostic LED operation, see the Intel® S5000 Server Board Family Datasheet.

7.15-Volt Standby LED

Several server management features of this server board require that a 5-V standby voltage be supplied from the power supply. Some of the features and components that require this voltage be present when the system is “Off” include the BMC within the ESB2-E, on-board NICs, and optional Intel® RMM connector when the Intel® RMM is installed.

The LED is located just to the right of the CMOS battery in the center of the server board and is labeled “5VSB_LED”. It is illuminated when AC power is applied to the platform and 5-V standby voltage is supplied to the server board by the power supply.

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Figure 18. 5-Volt Standby Status LED Location

7.2Fan Fault LEDs

Fan fault LEDs are present for the two CPU fans and the two rear system fans. The two CPU fan fault LEDs are located next to each CPU fan header. The two rear system fan fault LEDs are located next to each rear system fan header as shown in the following figure.

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Figure 19. Fan Fault LED Locations