[請益] 風扇有雜音
今年5月在原X屋買了T40F-TB風扇，
用了約半年後開始有「咔啦咔啦」聲，
底下有錄一段影片，
轉速越快聲音也跟著變大聲跟變快，
想請問一下這是正常的嗎？
感謝大家替小弟解答一下
https://youtu.be/N9WZitAll9E
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