Shanghai Dell notebook maintenance department: 
 URL: 
 Tel: 592; phone:, Contact: Chun-Hui Wang 
 Maintenance Department Address: No. 861 Tian Yao Qiao Road Building 2, Room 1504, North Sea, near Lingling Road. 

 Notebook computer failure can be divided into the following categories. 

 Power failures are not 
 Also known as "do not trigger the" failure. This failure can not turn on the computer, the majority of power circuit failure. 
 Power is off, also known as "black" failure. This failure can not be lit display, it is the most common computer failures, this fault is usually the motherboard, CPU, memory or display part fails, the board can be created for each part of the "black" failure. 

 Crash failure. 
 This failure is a user in the course, regular "hang" or "blue screen", which may cause the hardware may be the reason the software. Can not "bootstrap" failure. Such failures can not boot the system, usually system files or hard disk failure, need to reinstall the system or replace the hard disk. 

 LCD screen failure 
 Generally high-voltage circuit, and the screen backlight system failure. 

 1. Do not start class failure 

 Symptom: No power means the laptop can not power, that is, press the power button, laptop computer does not have any boot phenomena such as the power light and hard disk light is not lit, CPU fan does not turn, just as there is no start button pressed the same. 

 2. Turn off class failure 

 Symptom: Failure is the ability to boot off the boot, but can not light up display. When pressing the power button, power light and hard disk light is lit, CPU fan is also turned, can also switch to a normal machine, but the external monitor does not display.