Intel SBXD62 User Guide - Page 22
Using Light Path Diagnostics to Troubleshoot the System Board, Table 2, System Board,
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Using Light Path Diagnostics to Troubleshoot the System Board You have to remove the blade server from the Intel® Blade Server Chassis SBCE, open the cover, and press the light path diagnostics switch (SW4) to light any error LEDs that were turned on during processing. These LEDs can be used to help troubleshoot systemboard component problems. See the illustrations in this section, Table 2, "System Board LEDs" on page 13 and Table 3, "Light Path Diagnostics Panel LEDs" on page 13 for information about locating light path diagnostics LEDs and what to do if there is an error LED lit. "Light Path Diagnostics LEDs" on page 51 provides more information about the light path diagnostics LED locations, settings, and error solutions. Refer to these illustrations and tables when solving problems with the blade server. Power is available to relight the light path diagnostics LEDs for a small period of time after the blade server is removed from the Intel® Blade Server Chassis SBCE. During that period of time, you can relight the light path diagnostics LEDs for a maximum of 25 seconds (or less, depending on the number of LEDs that are lit and the length of time the blade server is removed from the Intel® Blade Server Chassis SBCE) by pressing the light path diagnostics button. The light path diagnostics power present LED (CR111) is lit when the light path diagnostics button is pressed if power is available to relight the bladeerror LEDs. If the light path diagnostics power present LED (CR111) is not lit when the light path diagnostics button is pressed, no power is available to light the blade-error LEDs, and they will be unable to provide any diagnostic information. The following illustration shows the LEDs on the system board. Light path diagnostics (SW4) DIMM 1 error LED (CR201) DIMM 2 error LED (CR4) Microprocessor 1 error LED (CR12) DIMM 3 Error LED (CR5) DIMM 4 Error LED (CR6) I/O expansion connectors SAS 1 hard disk drive LED (CR262) Reserved Control panel connector Microprocessor 2 error LED (CR13) 3V lithium battery SAS 0 Hard disk drive LED (CR260) SAS trays/connectors 12 Intel® Server Compute Blade SBXD62 Installation and User's Guide