IBM 86624RY Maintenance Manual - Page 298

Information panel system error LED The system error LED is turned on on when an error is detected. If the system error LED is on, remove the cover and check the diagnostic panel LEDs. The following is a complete list of diagnostic panel LEDs followed by the FRU/Action for replacing the problem. Important If a diagnostic panel LED is on and the information LED panel system error LED is off, there is probably an LED problem. Run LED diagnostics. Notes 1. To locate the LEDs on the processor board see "Processor board component locations" on page 254. 2. Check the System Error Log for additional information before replacing a FRU. 3. The memory board DIMM error LEDs, processor error LEDs, and VRM error LEDs turn off when the system is powered down. Diagnostic Panel LED All LEDs off (Check System Error Log for error condition, then clear System Error Log when the problem is found.) Only CPU LED on (The LED next to the failing CPU should be on.) CPU LED and VRM LED on (The LED next to the failing VRM should be on.) CPU Wrong Slot LED on (CPU and terminator card installation order is wrong.) DASD 1 LED on (The LED located next to the drive bay that the failing drive is installed in will be turned on.) FRU/Action 1. System Error Log is 75% full; clear the log 2. PFA alert; power the system off then on 3. Run Information Panel diagnostics 1. Processor 1, 2, 3, or 4 2. Processor Board 1. Voltage regulator module indicated by the VRM LED on the processor board that is turned on 2. Processor indicated by the Processor LED. 3. Processor Board 1. CPU and terminator card installation order See"Microprocessor installation" on page 238 . 2. Processor(s) 3. Processor Board 1. Failing drive. 2. Be sure the fans are operating correctly and the air flow is good. 3. SCSI Backplane 290 Netfinity Server HMM