台式电脑主机没有电，指示灯不亮？ 台式电脑显示器指示灯不亮，也不显示什么原因？
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1、首先检查你的电源插线板有没有点，换个插孔行不行。
2、如果电源没有问题，建议换一条电源线试试。如果换了线还不行，就不是说几句话能解决的问题了。
3、电源灯都不亮，说明要么是电脑的电源问题或者是主板问题，都需要更换配件解决。让dell的工程师来解决吧，他们的售后应该效率还可以。
把电源绿线和黑线短接，看看风扇转不转？
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