On this page of our guide to Layers of Fear 2 we have provided a detailed description of the riddle with two TVs and X-Rays, which has to be solved during act 4. You will solve this puzzle during the release of rats from cages.
This riddle is being solved in one of the rooms visited in order to free a rat ("lost soul") from the cage. TVs and x-rays are built in the furniture to the left of the entrance.
This puzzle may seem complicated at first glance, but it is actually relatively simple. You have to set the same body parts on TVs and on x-rays.
Use the left handle of the TV to select the head photo.
Use the right TV control to select a photo of the palm facing to the right.
Here is the example of the correct settings on both TVs.
After completing the puzzle, you can approach the cage with the rat and unleash a new soul.