正常按开机建之后一直是黑屏 只有左上角一个光标在闪

LZ是开机就黑屏，一直是这样的么？还是偶尔？
最近是否有下过什么软件之类的？

建议用排除法
1.先是更换电源
2.然后内存插拔和清理下
3.显卡插拔和清理，最后主板……
上面清理包括金手指、

另：没解决之前，不排除显示器问题和Windows不是正版

光标后可以输入吗？
如果可以请输入：
Is the computer is blank screen, have been that way? Still occasionally? If there is a recent under any software and so on? Suggest using exclusive method 1. First replace the power supply 2. Then memory plug and clean up the 3. Graphics plug and cleaning, and finally motherboard... Clear above including gold finger, another: not resolved, do not eliminate display problems and Windows is not genuine.

最后按enter

您好，您在开机出现联想logo时按F2进入bios，恢复一下bios默认设置，然后将硬盘设置为第一启动项，保存退出后重启，看能否解决。