1、查看一下是否是由于显示器的电源没有正确开启，或者是电源线没有连接。2、检查一下电脑主机的显示器信号线与主机接口位置，查看是否松动。如果线路松动，重新拔插即可。或者是将显示器的信号拔出了，检查显示器[详细]
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