There is a little stepper motor inside the AVP to move the lens where it needs to be. That should be the sound you are hearing.
The distance of the lens also depends on the distance from your eye to the screen/lens.
If this isn’t right then things are not going to be as sharp as they could be.
The distance of the lens also depends on the distance from your eye to the screen/lens.
If this isn’t right then things are not going to be as sharp as they could be.