Dusting: All lights on

Sometimes, when dusting the system, all lights on the 552 go on, last time the left channel muted.
After switching the system off and on again, everything was normal again.
I assume, this is a static thing due to dusting.
I do not really mind, but I wonder if this is in any way harmful to the system? Any experiences?

This can happen from static. I think the logic circuits get a bit scrambled. A power cycle should correct things.

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I get this quite often, you can actually hear a static discharge. Pressing any button puts all the lights back to normal. I have managed to convince myself it sounds better after the static has discharged…

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