7.3.1System Status LED – BMC Initialization

When the AC power is first applied to the system and 5V-STBY is present, the BMC controller on the server board requires 5-10 seconds to initialize. During this time, the system status LED blinks, alternating between amber and green, and the power button functionality of the control panel is disabled preventing the server from powering up. Once BMC initialization has completed, the status LED stops blinking and the power button functionality is restored and can be used to turn on the server.

7.4DIMM Fault LEDs

The server board provides a memory fault LED for each DIMM socket. These LEDs are located towards the rear of the server board next to each DIMM connector.

AF000205

Figure 21. DIMM Fault LED Locations

7.5Processor Fault LEDs

The server board provides a fault LED for each processor socket. These LEDs are located near the processor sockets.

AF000206

Figure 22. Processor Fault LED Locations

7.6Post Code Diagnostic LEDs

The POST code diagnostic LEDs are located on the back edge of the server board in the rear I/O area of the server board between the PS/2 mouse/keyboard stacked connectors and the video/serial stacked connectors.

During the system boot process, the BIOS executes a number of platform configuration processes, each of which is assigned a specific hex POST code number. As each configuration routine is started, the BIOS displays the given POST code to the POST code diagnostic LEDs on the back edge of the server board. To assist in troubleshooting a system hang during the POST process, the Diagnostic LEDs can be used to identify the last POST process to be executed. See Appendix C for a complete description of how these LEDs are read, and for a list of all supported POST codes.

Figure 23. POST Code Diagnostic LED Location