IBM 88631SU Service Guide - Page 77
Light Path, Diagnostics - specs
UPC - 000435913135
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Many errors are first indicated by a lit information LED or system-error LED on the operator information panel on the front of the server. If one or both of these LEDs are lit, one or more LEDs elsewhere in the server might also be lit and can direct you to the source of the error. Note: Read the safety information beginning on page vii and "Handling static-sensitive devices" on page 114. View the LEDs in the following order: 1. Check the operator information panel on the front of the server. v If the information LED is lit, it indicates that information about a suboptimal condition in the server is available in the BMC log or in the system-error log. Important: If the server has a baseboard management controller, clear the BMC log and system-event log after you resolve all conditions. This will turn off the information LED and LOG LED, if all conditions are resolved. v If the system-error LED is lit, it indicates that an error has occurred; go to step 2. The following illustration shows the operator information panel. Power-control button Information LED USB connector Release latch Power-on LED Hard disk drive activity LED Locator LED System-error LED 2. To view the light path diagnostics panel, press the release latch on the front of the operator information panel to the left; then, slide it forward. This reveals the light path diagnostics panel. Lit LEDs on this panel indicate the type of error that has occurred. Light Path Diagnostics REMIND OVER SPEC PS LINK CPU VRM LOG MEM NMI PCI SP DASD RAID NONRED TEMP FAN PCI CPU I/O BRD BRD BRD Look at the system service label on the top of the server, which gives an overview of internal components that correspond to the LEDs on the light path Chapter 2. Diagnostics 61