I had never thought much about repairs like this until several years ago when I opened my laptop and found a cracked LCD. Immediately I knew how it happened. I recalled seeing it on the floor next to the couch the day before after one of my kids was using it....and they had stepped on it. I refused to go buy another laptop. It wasn't that old. So I started to take it apart to see if I could replace just the LCD. It was a success. A year or so later my wife dropped her new iPhone 4s. Cracks everywhere in the glass. Almost immediately remembering the laptop, I told my wife not to worry. That phone has to be able to come apart somehow. I can figure it out. That was a success as well. She mentioned this to her friends and I suddenly had some requests to fix their phones too! So after doing repairs on the side for a number of years it has evolved into a small side business.