【Hardware】Mac外接DELL显示屏时报错“No DP Signal”无法连接_no dp signal from your device

解决Mac外接显示屏使用DP to Type-C线缆时"No DP signal"无法连接问题。此问题出现在曾成功连接过显示器，后待机/关机一晚不用，第二天就无法连接。解决方案：重置显示器。以下是DELL官方文档。

How to reset the monitor

No cables, power button reset

• Turn the PC off 电脑/主机关机
• Turn the monitor off 显示器关闭
• Disconnect every cable (including the power cable) from the monitor 断开显示器连接的所有线缆 包括电源
• Press the monitor power button in for 8 seconds (clears any residual power in the circuits). If not a mechanical power button, just wait 8 seconds 按住显示器开关8秒以清除所有余电
• Reconnect the power cable and one video cable to the monitor and PC 重新连接电源和一根音视频信号线到电脑主机
• Turn the monitor on, then the PC and retest 开启显示器，然后开启主机