This is what worked for me, in my case, I have an RTX 3090Ti just launch the Nvidia Control Panel and under 3D Settings select Manage 3D settings on the upper left, then the Manage 3D Settings box will appear, scroll down about mid ways and click on Multi-Frame Sampled AA (MFAA) till the On or Off drop down selection apears, select Off, then just scroll down and hit Apply, I tried turning it back on and got the Black Screen, turned it off and the Live Video tiles appeared, tried this at least 5 times so there is no doubt this was my issue, help this helps
