推荐回答(3个)
电脑ATX电源又称开关电源 可视为由主电路和辅助电路(提供开机所用5V电压) 电源未启动 说明主电路并未工作 问题出在辅助供电电路 发出滋滋的响声很有可能是电容发出的 一般是类似耳鸣般的持续声响 也有部分发出断续或者其他声响
电容并未完全损坏 现存容量还足以工作 所以可以启动
解决方法
打开外壳(危险 一定要断电 如果没有电工基础我劝你放弃下面的步骤)
正常的电源关闭后会自行释放电容内电压 但是还是要小心里面那几个大号的圆柱体 有可能存有300V的直流电
查看辅助供电电路(找不到的话就看整个板子 也没多大)上的电解电容(圆柱形) 发现涨肚甚至爆浆者换之
修复完成
后注 找不到同型号可用同容量高耐压换掉 没有的话高容量优先 低容量次之
我曾经换过两个滋滋响的电容 1000μF 换成了俩470μF(缩水有点大 哈哈)绿线接地 不启动 把其中一个旧电容用改锥尾部压成貌似正常(版权所有哈哈)装了回去 开机正常 使用至今
电源的内部结构能产生声音的只有里面的风扇
拆开电源将风扇接电源的接口拔下
再试
试的时候手不可触碰到电源的元器件部分
因为元器件变压器前段是高压部分
试出的结果应该是无任何声音
这样的话你可以去电脑城配一个新风扇装上即可了
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