Computer Repair with Diagnostic Flowcharts: Troubleshooting PC Hardware Problems from Boot Failure to Poor Performance, is not for absolute beginners, as you can see from looking at any of the diagnostic charts. There are no photo-illustrations in the book, no history, nor explanations of basic computer part functions, like "What's a hard drive?". The sole focus of the book is learning a structured approach to PC repair. The intended audience is hobbyists who already have some experience repairing computers or beginning computer technicians. The book has been adopted as a class text in several technical colleges and vocational training programs.