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Yes, PSU is the Power Supply Unit. They are known for failing when they are turned back on after a power is lost.
by jrrtokenring 5y ago
Yes, PSU is the Power Supply Unit. They are known for failing when they are turned back on after a power is lost.
- tialaramex 5y agoThis is why your 6509 should have dual PSUs.
- richardfey 5y agoIn my case also after turning off and on the building main power switch, after a brief 12 years of service.