Second screen goes full black when using browser streaming services

[SlyK182]

Hi everyone, during the last week I've been experiencing troubles using my second monitor.

A few seconds after I start watching a video from a browser streaming service (Disney+, Prime Video, Netflix), the monitor goes full black.

It happens with every browser I try (Edge, Firefox, Chrome).


Stuff that might be useful (or might not, who knows at this point):

1. PC's a 2015 Lenovo z50-70 (so first screen is the laptop's own screen)
2. monitor's a Samsung S24D330
3. monitor's connected via HDMI
4. video drivers are correctly updated
5. I ran some diagnostics using the Windows built-in tools but everything seems fine
6. monitor works fine when I use it with my company PC (Dell XPS13, runs Ubuntu 20.04)
   
7. sometimes the screen stays black even after I closed the whole browser
8. sometimes the screen goes black even if the browser is open on the laptop's screen
9. sometimes it doesn't go black if I start watching a video using the laptop's screen and then I move the browser window to the monitor

I can't seem to find a way out of this.

Hope someone can help me out!

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