S2600 Server shutdown issue

[SFull2]

Just has a S2600 server shutdown without notice. Following is from Event logs just like some thought on what is most likely cause. Server is UPS protected and other servers on same UPS had no issues.

Physical removal of power cords from power supplies and reset server booted fine?

1500 05/11/2016 14:01:19 Pwr Unit Status Power Unit reports the power unit has suffered a failure - Deasserted

1499 05/11/2016 14:01:17 Pwr Unit Status Power Unit reports the power unit is powered off or being powered down - Deasserted

1498 05/11/2016 14:01:12 Pwr Unit Status Power Unit reports the power unit is powered off or being powered down - Asserted

1497 05/11/2016 14:01:11 Pwr Unit Status Power Unit reports the power unit has suffered a failure - Asserted

1496 05/11/2016 13:59:44 Pwr Unit Redund Power Unit reports redundancy has been lost and there are insufficient resources to maintain normal operation - Asserted

1495 05/11/2016 13:59:43 PS2 Status Power Supply reports the power supply's input (AC/DC) has been lost - Asserted

1494 05/11/2016 13:59:43 Pwr Unit Status Power Unit reports the power unit is powered off or being powered down - Asserted

1493 05/11/2016 13:59:42 Pwr Unit Redund Power Unit reports redundancy has been lost, but the unit is still functioning with the minimum amount of resources needed for normal operation - Asserted

1492 05/11/2016 13:59:42 Pwr Unit Redund Power Unit reports redundancy has been lost - Asserted

1491 05/11/2016 13:59:41 PS1 Status Power Supply reports the power supply's input (AC/DC) has been lost - Asserted

1490 05/11/2016 13:57:53 Button Button / Switch reports the power button has been pressed - Asserted

1489 05/11/2016 13:11:18 BMC FW Health Management Subsystem Health 'P2 Therm Ctrl %' sensor has failed and may not be providing a valid reading - Asserted

1488 05/11/2016 13:11:18 BMC FW Health Management Subsystem Health 'P1 Therm Ctrl %' sensor has failed and may not be providing a valid reading - Asserted

1487 05/11/2016 13:09:55 BMC FW Health Management Subsystem Health 'SSB Temp' sensor has failed and may not be providing a valid reading - Asserted

1486 05/11/2016 13:09:55 BMC FW Health Management Subsystem Health '' sensor has failed and may not be providing a valid reading - Asserted

1485 05/11/2016 13:09:54 BMC FW Health Management Subsystem Health 'P2 Therm Margin' sensor has failed and may not be providing a valid reading - Asserted

1484 05/11/2016 13:09:54 BMC FW Health Management Subsystem Health 'P1 Therm Margin' sensor has failed and may not be providing a valid reading - Asserted

1483 05/11/2016 13:09:37 BB +1.05V P1Vccp Voltage reports the sensor is in a low, critical, and going lower state - Asserted

1482 05/11/2016 13:09:37 BB +1.05V P1Vccp Voltage reports the sensor is in a low, but non-critical, and going lower state - Asserted

1481 05/11/2016 13:09:12 Pwr Unit Status Power Unit reports the power unit has suffered a failure - Deasserted

1480 05/11/2016 13:09:10 Pwr Unit Status Power Unit reports the power unit is powered off or being powered down - Deasserted

1479 05/11/2016 13:09:05 Pwr Unit Status Power Unit reports the power unit is powered off or being powered down - Asserted

1478 05/11/2016 13:09:05 Pwr Unit Status Power Unit reports the power unit has suffered a failure - Asserted

1475 05/11/2016 13:09:12 Pwr Unit Status Power Unit reports the power unit has suffered a failure - Deasserted

1474 05/11/2016 13:09:10 Pwr Unit Status Power Unit reports the power unit is powered off or being powered down - Deasserted

1473 05/11/2016 13:09:05 Pwr Unit Status Power Unit reports the power unit is powered off or being powered down - Asserted

1472 05/11/2016 13:09:05 Pwr Unit Status Power Unit reports the power unit has suffered a failure - Asserted