Power Subsystems 
System Event Log Troubleshooting Guide for EPSD
 
Platforms Based on Intel
®
 Xeon
®
 Processor E5 4600/2600/2400/1600/1400 Product Families 
30  Intel order number G90620-002  Revision 1.1 
Baseboard +3.3V Auxiliary 
(BB +3.3V AUX) 
+3.3V AUX is supplied by the main board. 
+3.3V AUX is used by the BMC, clock chips, PCI-E Slot, on-board NIC, Intel
®
 C600 series Chipset, and 
ICH. 
1.  Ensure all cables are connected correctly. 
2.  If the issue remains, replace the board. 
3.  If the issue remains, replace the power supplies. 
Baseboard +1.05V Processor1 Vccp 
(BB +1.05Vccp P1) 
This 1.05V line is supplied by the main board. 
This 1.05V line is used by processor 1. 
1.  Ensure all cables are connected correctly. 
2.  Check the processor is seated properly. 
3.  Cross test the processors. If the issue remains with the processor socket, replace the main board, 
otherwise the processor. 
Baseboard +1.05V Processor2 Vccp 
(BB +1.05Vccp P2) 
This 1.05V line is supplied by the main board. 
This 1.05V line is used by processor 2. 
1.  Ensure all cables are connected correctly. 
2.  Check the processor is seated properly. 
3.  Cross test the processors. If the issue remains with the processor socket, replace the main board, 
otherwise the processor. 
Baseboard +1.5V P1 Memory AB 
VDDQ 
(BB +1.5 P1MEM AB) 
This 1.5V line is supplied by the main board. 
This 1.5V line is used by processor 1 memory slots A and B. 
1.  Ensure all cables are connected correctly. 
2.  Check the DIMMs are seated properly. 
3.  Cross test the DIMMs. If the issue remains with the DIMMs on this socket, replace the main 
board, otherwise the DIMM. 
Baseboard +1.5V P1 Memory CD 
VDDQ 
(BB +1.5 P1MEM CD) 
This 1.5V line is supplied by the main board. 
This 1.5V line is used by processor 1 memory slots C and D. 
1.  Ensure all cables are connected correctly. 
2.  Check the DIMMs are seated properly. 
3.  Cross test the DIMMs. If the issue remains with the DIMMs on this socket, replace the main 
board, otherwise the DIMM.