accidnetally pressed LAN button on a game released in 1999, intermittent black screen when opening Netflix & Amazon Video, flashing red flecks on disp

[Guest SebastianHayball]

Hardware configuration:CPU: intel core i5-8600KGPU; NVIDIA GeForce GTX 1080 TiMonitor: LG TV model no. 55UM7510PLAOS: Windows 10I don't know whether 'devices and drivers' is the correct topic?My issue is I downloaded an old game (Command & Conquer: Tiberian Sun) from the web and it works fine. I played it for a few hours and then went back to the main menu where I accidentally pressed the LAN button. My screen went black and when I pressed the Windows button to get back to the desktop everything on my screen was really tiny, after restoring it to the recommended resolution, going back into

 

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