Pulsating Noise every 460ms

[musicmaker12]

Hello,
I sometimes get a pulsating noise signal every 460 ms. All the lights on the mixer flash in the same rhythm.
The only thing that helps is to switch off the mixer.

Does anyone know this problem? Is there a solution here?

Fortunately, this doesn't happen that often.

[Phil.c]

It could be a few things but I would do a ribbon connector clean before anything else, alsothe Data connectors and BFC re-seat.