SEL Troubleshooting Guide

Power Subsystems System Event Log Troubleshooting Guide for Intel® S5500/S3420 Series Server Boards
20 Intel order number G74211-002 Revision 1.1
Sensor
Number
Sensor Name
Next Steps
18h
BB +3.3V Vbat
+3.3V Vbat is supplied by the CMOS battery when power is off and by the main board when power is on.
+3.3V Vbat is used by the CMOS and related circuits.
1. Replace the CMOS battery. Any battery of type CR2032 can be used.
2. If error remains (unlikely), replace the board.
19h
BB +5.0V
+5.0V is supplied by the power supplies.
+5.0V is used by the PCI slots.
1. Ensure all cables are connected correctly.
2. Reseat any PCI cards, and try them in other slots.
3. If the issue follows the card, swap it, otherwise, replace the main board.
4. If the issue remains, replace the power supplies.
1Ah
BB +5.0V STBY
+5.0V STBY is supplied by the power supplies.
+5.0V STBY is used to generate other standby voltages.
1. Ensure all cables are connected correctly.
2. If the issue remains, replace the board.
3. If the issue remains, replace the power supplies.
1Bh
BB +12.0V
+12V is supplied by the power supplies.
+12V is used by SATA drives, Fans, and PCI cards. In addition it is used to generate various processor voltages.
1. Ensure all cables are connected correctly.
2. Check connections on fans and HDDs.
3. If the issue follows the component, swap it, otherwise, replace the board.
4. If the issue remains, replace the power supplies.
1Ch
BB -12.0V
-12V is supplied by the power supplies.
-12V is used by the serial port and by PCI cards. In addition it is used to generate various processor voltages.
1. Ensure all cables are connected correctly.
2. Reseat any PCI cards, and try them in other slots.
3. If the issue follows the card, swap it, otherwise, replace the main board.
4. If the issue remains, replace the power supplies.