Unplug power from the things that rotate and make noise. The picture only shows me two such devices. What else is there?
Rattling noise coming from lower left box in this image. It's NOT the fan in upper left or lower right. It's for sure in that box at lower left. Suggestions? Thank you. https://photos.app.goo.gl/YkbS8NeAdmj8yrJ77

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