IBM 86884RX Maintenance Manual - Page 157

Chapter 6. Symptom-to-FRU index This index supports xSeries 450 servers. Notes: 1. Check the configuration before you replace a FRU. Configuration problems can cause false errors and symptoms. 2. For IBM devices not supported by this index, refer to the manual for that device. 3. Always start with "General checkout" on page 33. The Symptom-to-FRU index lists symptoms, errors, and the possible causes. The most likely cause is listed first. Use this Symptom-to-FRU index to help you decide which FRUs to have available when servicing the server. The left-hand column of the tables in this index lists error codes or messages, and the right-hand column lists one or more suggested actions or FRUs to replace. Note: Some tables have more than two columns; in those instances, more than one column on the left is required to describe the error symptom. Take the action (or replace the FRU) suggested first in the list of the right-hand column, then try the server again to see if the problem has been corrected before taking further action. Note: Try reseating a suspected component or reconnecting a cable before replacing the component. Light Path LED errors The system-error LED on the operator information panel is lit when certain system errors occur. If the system-error LED on your server is lit, use the following table to help determine the cause of the error and the action you should take. Before replacing any FRU: 1. Observe LEDs on boards. 2. View the system-error log. 3. Run AMIDiag program. Level 2 Light Path LED None (An error has occurred and cannot be isolated, or the ASM processor has failed.) All LEDs off (error log full) Note: ″See Log″ LED might be lit. CPU LED on (failed processor) Note: Verify correct installation sequence; see "Installing and replacing a microprocessor and power module" on page 100. FRU/action An error has occurred that is not represented by a Light Path Diagnostics LED. Check the system-error log for more information about the error. 1. System-error log is 75% full; clear the log. 2. PFA alert; check error log for failure; clear PFA alert; remove ac power for at least 20 seconds, reconnect, then turn on server. 3. Run diagnostics. 1. See the system-error log. 2. Microprocessor 1-4. Note: To see microprocessor error LEDs, remove the processor-board assembly from the chassis, and press the LED activation switch. 3. Processor board. © Copyright IBM Corp. 2003 147