Blinking Led Light In Ref 10 Phono

[Number95]

Last night I realized a green (presumably LED) light blinking in control unit of my Ref 10 phono while the unit was switched off. The blinking frequency was approx 1 sec on-off and it kept going after I turned on the unit on and off. The intensity of the light is not strong so when lights are on at the listening room, it is hard to realize it, but when lights are off, it is easy to discover it via grills. I took out the power cord of power supply unit and then plugged in, it started again. I tested the unit via listening and did not notice any problems. Has anyone experienced a similar issue or any suggestions?

[BillK]

It may simply be an internal LED meant to note when mains power is available to the unit; have you called ARC?