If your looking for a promising career in fixing computers/Laptops you should start with Dell. Dell laptops are made so that a techy wouldn't have to go through the hell trying to fix your laptop. Desktops it doesn't have to be a dell. Most of the consumer desktops that you see at your everyday wallmart or target are built on the same platform that every company uses.
If your wanting to jump right into the laptop repair service you might as well just start off by getting your hands on a Latitude 600 to 630. This model is widely used in most offices for its easy to use and cheap when bought in bulk. On top of that its really easy to take apart.
