1、显示屏和主机信号线连接有问题。主机和显示器的连线接触不良(特别是接口处没有插好或者松动），还有可能这根连接的数据线出现问题,所以才会出现没有信号输入到屏幕，无显示，黑屏 2、主机没能正常启动（主机[详细]
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