Windows 10: HP laptop no longer detects its own internal monitor when I connect an external monitor

I have tried many of the solutions online and I cannot figure it out. It's not the HDMI cable, as the external monitor is detected. It is the laptop monitor itself that goes undetected. If I disconnect the external monitor, the laptop internal monitor works just fine. I"m not able to select the laptop monitor as the main one once I connect to a secondary one. I need 2 monitors to work. The laptop only has one HDMI connection, but it's not the connection, as it recognizes the external monitor well. The drivers are all up to date, I ran all types of tests on the laptop and they all pass... wind

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Lenovo Laptop not detecting external monitor(s)

My Lenovo Laptop is no longer recognizing my external monitors. this worked fine until a few days ago. I have updated, removed, reinstalled the intel graphics driver and run intel diagnostic as well as windows diagnostic. All internal HW passes tests. The computer thinks it is fine.

When I take the same usbc hub and connect it to my cell phone it is able to detect and display on the external monitors but starting a few days ago my laptop has just decided to stopped detecting the external monitor(s). I have two usbc ports on my laptop and I have tried the hub connected to both ports and neither will detect the external monitors. Is it possible that the error is related to the ports and not the graphics card? If so how do i diagnose or test the ports?

 

External monitors no longer detected

Have been using 2 external monitors with my surface laptop via a surface dock, and as of today they are no longer detected.

 

Windows No Longer Detects my External Monitors

For the past year, I have connected two external monitors, a keyboard, mouse and speakers to my laptop through a docking station. I ran Windows Defender for the first time this morning following the update to Windows 10 version 1083. I left my apartment
while Windows Defender performed a full scan. When I returned, Windows no longer detected either external monitor through the docking station. The mouse, speakers and keyboard still work though. When I disconnected one of the monitors from the docking station
and connected the monitor directly into the laptop, Windows does detect that monitor.

Is this a Microsoft bug?