已解决： Display back light is turned off. Black screen problem. - Lenovo E41-45

Display back light is turned off. Black screen problem.

Display backlight is turned off. Black screen problem in laptop.

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Have you tried shining a light into the screen to see if it is still showing things, without the backlight?

If it is showing things, without a backlight, it needs a backlight repair/replace

If not, you may need to replace the whole screen

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Lenovo E41-45