Why does my external monitor stop working when I close my lid?

J

Joshua Clark3

I have an HP laptop running Windows 10. It is connected via USB C to an official HP docking station. I have 3 external monitors attached to the docking station via a combination of HDMI and DisplayPort. Everything was working fine until a week ago, when my middle monitor (DisplayPort) would only work when the laptop lid is open. If I shut the lid, the monitor goes black and then a few moments later it goes to sleep. I have tried to detect the monitor with the lid shut and it wont find it. When the lid is shut, there is a grayed out display, but I can do anything to it. I have rebooted he lapto

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