Error: VOLTAGE_SENSOR at MB/V_+3V3STBY has exceeded low warning threshold

[alisampras]

Dear Forum Users,

3 weeks ago, i saw amber lit on my T1000 server. Login to ALOM and i saw the following error message in showfaults:

ID Time FRU Fault
0 SEP 08 16:51:38 MB VOLTAGE_SENSOR at MB/V_+3V3STBY has exceeded low warning threshold.
The prtdiag output shows the following:

Voltage sensors:


Location Sensor Status 0749NNE043:CH/MB V_VCORE ok
0749NNE043:CH/MB V_VMEM ok
0749NNE043:CH/MB V_VTT ok
0749NNE043:CH/MB V_+1V2 ok
0749NNE043:CH/MB V_+1V5 ok
0749NNE043:CH/MB V_+2V5 ok
0749NNE043:CH/MB V_+3V3 ok
0749NNE043:CH/MB V_+5V ok
0749NNE043:CH/MB V_+12V ok
0749NNE043:CH/MB V_+3V3STBY disabled

LEDs:


Location LED State 0749NNE043:CH/SYS ACT steady
0749NNE043:CH/SYS LOCATE off
0749NNE043:CH/SYS SERVICE steady
============================ FRU Status ============================
Location Name Status

0749NNE043:CH/FT0/F0 FAN enabled
0749NNE043:CH/FT0/F1 FAN enabled
0749NNE043:CH/FT0/F2 FAN enabled
0749NNE043:CH/FT0/F3 FAN enabled
**0749NNE043:CH MB disabled**
0749NNE043:CH/MB/CMP0/CH0/R0/D0 DIMM enabled
0749NNE043:CH/MB/CMP0/CH0/R0/D1 DIMM enabled
0749NNE043:CH/MB/CMP0/CH0/R1/D0 DIMM enabled
0749NNE043:CH/MB/CMP0/CH0/R1/D1 DIMM enabled
0749NNE043:CH/MB/CMP0/CH3/R0/D0 DIMM enabled
0749NNE043:CH/MB/CMP0/CH3/R0/D1 DIMM enabled
0749NNE043:CH/MB/CMP0/CH3/R1/D0 DIMM enabled
0749NNE043:CH/MB/CMP0/CH3/R1/D1 DIMM enabled
0749NNE043:CH PS0 enabled

1) What happen to my system?

2) How can i resolve the issue?

Hope someone can point me to right direction.

Sincerely,
Alisampras