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The Lenovo IdeaPad U350 was released in 2009 as a low-cost, thin, light laptop. It shipped with Windows Vista Home Premium (64-bit) or Ubuntu and features a 13.3" display.

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Why is my screen display dark when the power is on?

I can hear the fan running and see the lights when I boot up but I can't see anything on the screen (it's black).

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Connect an external monitor and let us know what that shows.

完成的

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There are several possibilities:

1) A failing graphics card.

2) Your screen cable has been disconnected.

3) Your brother placed a sheet of black paper on the screen to mess with your head.

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