This is practical reference book, which uses simple testing methods within minutes one can confirm whether laptop failure is software or hardware related with a diagnostic accuracy of 99%. Another feature of this book is that one can select a typical repair shortcut thereby saving considerable "swap test" time i.e. avoid trial and error. For most readers, this book will provide most of the failure status information needed. There are thirteen diagnostic flowcharts at the core of this book are marked with the percentage (probability) of the failed component along with its name. The repair shortcuts are intended to help the advanced amateur or technician to quickly repair the laptop and check up the components marked with a high failure rate from the diagnosis flowcharts, and then gradually inspect the components showing lower failure percentage. The book also contains 300 classic repair cases, and dozens of fault detecting methods with application skills. Also adopted here, is a unique mode of operation to repair laptops with simple steps. One can refer to the eight articles in "Analysis and diagnostic table" to find the information matching particular your case. Experience in this book will work for you to become "repair experts" to solve the problems of many laptops.