Hypothetically...
A TV screen is composed of pixels. Each pixel is composed of a combination of red, green, and/or blue. For ease, we'll use a 1080p screen. 1920x1080 pixels, or 2,073,000 pixels.
Every single image that is displayed or will ever be displayed on that TV is just a combination of those 2 million pixels in different RGB. There is a finite, although incomprehensibly large number of possible combinations that those pixels could be in.
If a TV could hypothetically cycle between every single possible combo of those 2 million pixels, and combo of those RGB in those pixels, could you then not hypothetically see every single possible thing that exists or could exist on that TV screen?
You would see past, present, and possible future, alien worlds even. Hitler with a clown nose! The same image of Hitler wearing the same clown nose, from every single possible angle! (Because he was a moron.)
The numbers get insanely large and it would take billions of years to cycle through every possible combination, probably longer than the life of the universe, but it would show everything eventually, right?