IBM x3655 Service Guide - Page 185

v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See Chapter 4, "Parts listing, System x3655, Type 7985," on page 97 to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU). v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a trained service technician. BMC log message Sensor Sensor number type Action VRD 3.3V 29 08 Information only Assertion 00 (Presence detected) VRD 3.3V 29 08 1. Remove the PCI adapters one at a time, to isolate the failing Assertion 01 (Power unit failure) component. 2. Inspect the IDE power cable. 3. (Trained service technician only) Replace the system board. 4. Replace the SAS backplane assembly. VRD 2.5V 2A 08 Information only Assertion 00 (Presence detected) VRD 2.5V 2A 08 1. (Trained service technician only) Reseat the microprocessor. Assertion 01 (Power unit failure) 2. (Trained service technician only) Replace the system board. VRD 2.1V 2B 08 Information only Assertion 00 (Presence detected) VRD 2.1V 2B 08 1. Inspect the SAS power cable. Assertion 01 (Power unit failure) 2. Replace the SAS backplane assembly. 3. (Trained service technician only) Replace the system board. 12V faults 2C 09 (Trained service technician only) Replace the system board. VRD 1.8V 2D 08 Information only Assertion 00 (Presence detected) VRD 1.8V 2D 08 1. Reseat the following components: Assertion 01 (Power unit failure) a. (Trained service technician only) Microprocessor b. Power supply 2. Replace the following components one at a time, in the order shown, restarting the server each time: a. (Trained service technician only) Microprocessor b. Power supply c. (Trained service technician only) system board Note: This power unit supplies power to the system board and the SAS backplane. VRD 1.4V 2E 08 Information only Assertion 00 (Presence detected) Chapter 5. Diagnostics 167