The laptop screen is black how do ah?

We have units in a notebook computer screen is black, almost invisible, the system can start normal, that is very dark, adjust the brightness is not easy to use, connect the power supply also may be why ah? How should do?

backlight lamp out of it, you change the lamp notebook what ah?

in power should be set up in regulation It!

In the control panel inside Zhaoyi Zhao! General in the boot when it is dark
backlight board may be out of the need to service stations to detect maintenance