If the backlight circuit intact , and the display circuit part of the problem , then we will see the back of the LCD screen with bright white light emitted . Most of the liquid crystal display backlight circuit failures are questions or problems with electrical power , the backlight circuit fault is most likely an internal short circuit or open circuit booster coil .

 

Tool configuration : ¢ 200 a screwdriver 4 * , 20w an electric iron , solder wire for some children , a knife ( these are very easy to find but also very cheap tools ) .

 

Maintenance of the whole process :

 

1 First, a liquid crystal display plus a separate power failure phenomenon observed , whether such failure performance. Then connect with the host good signal line , turn on the monitor , observe the monitor power light is always green , the LCD screen has no image display . If you carefully identify , will find faint images appear, but no backlight always appear .

 

2 to the desktop clean with a soft cloth mats on the desktop , the LCD display face down on the table upside down . Be sure to pay attention to your desktop clean, can not have any debris, otherwise the losses.

 

4 Unscrew the four fastening screws , remove the bracket

 

5 shown below , unscrew the lower corners of the display cover screws .

When removing the cover, note marked with a red arrow in the left and right channels of audio input plug lotus position following figure , the need to pull down , and then lift the cover up , in order to properly remove it.

 

The figure is the internal structure of the liquid crystal display to open the back cover , I believe we are more like to see what kind of liquid crystal inside it

 

Figure metal shield to prevent external electromagnetic interference caused by damage to the internal circuit to work properly. Where more than two laps round hole is cooling holes .

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