用了几年的电风扇无力了怎么维修（放了多年的电风扇没有力如何解决）

{"rich_content":{"text":"电风扇启动无力转速慢，多半问题出现在这个地方","spans":null},"video":{"vid":"v038b0e90000bsho9ngom49upjrmkihg","duration":125.28,"width":1024,"height":576,"file_size":14135654,"thumb":{"web_uri":"tos-cn-p-0000/b6283117b9ce484a9b1f9d745b0d4926","width":640,"height":360,"image_type":null,"mimetype":null,"encrypt_web_uri":null,"secret_key":null,"encrypt_algorithm":null,"extra":null},"video_size":{"high":{"duration":125.28,"file_size":17306942,"w":854,"h":480},"normal":{"duration":125.28,"file_size":12012016,"w":640,"h":360},"ultra":{"duration":125.28,"file_size":19972252,"w":1024,"h":576}},"is_encrypted":null,"sp":null,"md5":"3807aab6e13f222ec6ce7ee845ab0d48","tos_key":null,"secret_key":null,"encrypt_algorithm":null,"extra":null}},