1, laptop motherboard failure performance

（1）, Toshiba laptop does not start, boot no display;

（2）, laptop password is forgotten, can not enter the system;

（3）, notebook computers do not recognize optical drives, hard drives, floppy drives, serial ports, parallel ports, etc.;

（4）, Toshiba laptop can not install the operating system;

（5）, laptops often crash, lose power or automatically restart;

（6）, the laptop boot error, can not enter the system;

（7）, Toshiba laptop battery can not be charged.

2, the characteristics of the fault occurrence laptop LCD screen

(1) The notebook computer has a display and the LCD screen is dark;

(2) The computer's external monitor is normal, the LCD screen is blank, and the screen is blank;

(3) There are bright lines on the LCD screen of the laptop.

3, laptop keyboard failure phenomenon

(1) The computer keyboard cannot be pressed;

(2) Laptop keyboard keys;

(3), laptop keyboard automatically press.

4, laptop battery failure performance

(1) Laptop battery is not charged;

(2) The laptop battery can be charged and the discharge time is extremely short.