There is something about ADD, screens and hyperfocus. Some people with ADD can't stick to a task unless they use a lot of effort. It's simply not enjoyable having to try to do something that you cannot focus on.

But screens... talk about magic. My old best friend and my best friend now, both have ADHD. They can see a screen, TV, Iphone and they are just hooked. I thought, howcome they can't LISTEN to what I say the way they can focus on the screen? But they simply cannot. I had to accept it.

When they are hooked to a screen 3rd world war could happen without them knowing.

The obsession with the computer could be that it is EASY. It takes no effort. Then it becomes enjoyable. I understand the issue if your with someone, then both have to adapt. But working with it, remember you are restricting a world in which he can live with ease and you replace it with what is difficult. Even if it has to be done, you both must understand why it is hard.

Good luck.