Form 2 quietly and high noise if form 2 in in sleep modus

Hello, if I turn off my form 2 through the switch, making the printer is switched off quietly and high noise. Is that normal?
If I pull the power plug, the sound is gone.

Hi Stefan,

I was getting the same whine. I think the consensus is that it’s from an idling stepper motor (even in sleep mode), and upgrading the firmware to a newer version helps to mitigate.

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