6509 Power Supply Problem

[benghock]

I have a 6509 chassis w/1 Sup720 and dual 3000W power supplies. The switch has been power on for pass 2 weeks, until recently the problem started When we discovered that the switch has been shutdown and the "power switch" has been switch from "I" to "0", it happened few time with few days interval. I've checked through Cisco website and has verified that it was not related to switch fan tray power requirement. If is cause by the data center power surge, will it cause the "power switch" to switch from "I" to "0". Any ideas?

[Roberto Salazar]

Do you mean the actual power supplies switch have changed from "I" position to "O" position? There is no way a power supply failure or CLI can turn that switch. I would think someone is turning the switch.