2nd monitor only works on laptop if its first plugged into PC, then factory reset, then plugged back into laptop.

[HeinrichThiart]

Hello

I have a Samsung S24D300 that I use as my main display on my gaming pc. When I want to work I plug my mouse, keyboard and monitor into my laptop, Acer Extensa 2540 i5-7200u running Intel HD Graphics 620. Windows 10 Education version 20H2

Usually I use a VGA 1366x768 monitor but I needed a larger display. But for some reason it doesn't work. Windows can see it, it shows 1 and 2. But no option works. Clicking Detect says Windows cant find it. The monitor will come on, shows HDMI, with that faded black look. So its on, but not working. I can move windows to the 2nd monitor but its just not displaying anything. 

I've even tried going into the Intel Graphics settings and changed the resolution, refresh rate, nothing works. Updated the drivers. Still nothing. 

So here's how I get it to work. 

I plug it back into my pc, do a factory reset on the monitor, plug it back into the laptop and it will work. 

It will stop working if I plug it back into my pc. Why is this happening?