Hi there. I’ve had my PPP for about 9 years or so with trouble free operation. Lately it has started to “click,” as if a relay is coming off and on. There seems to be no effect on the components plugged in, and nothing new has been plugged in in at least a year.
The incoming voltage is between 119 and 124, though usually stable at 121. Incoming distortion is 2.4, and so is outgoing distortion - 2.4.
The clicking happens when all devices are turned off, but the PPP is on.
The clicking happens when the PPP is turned off but still plugged into the wall.
The clicking is intermittent - it will be quiet for a number of hours and then start, and last for a number of hours.
All the Zones are set to “Switched,” the default setting.
Thanks for your time!