Different companies have different components in their laptops. All these companies once their components from other distributors. Notebooks are usually composed by several other companies than it will sell. Some of the components of the third person of the LCD screen, processor, hard drive, keyboard and memory.
IBM, Dell, Compaq and HP do not sell new or refurbished laptops, unless they meet their standards because the reputation of any company depends on it. Therefore refurbished laptops, reliable, and cost-effective.

