Why is my laptop staying idle at a black screen after boot-up?

This morning when I tried turning on my laptop, I noticed that the screen continued to stay idle with a black screen. I could hear the laptop running but the laptop screen stay off even after 15 minutes of waiting. My diagnosis was that the laptop may have overheated from my extended use last evening so I unplug the A/C adapter and took out the battery. After booting up the laptop again, the same issue occurred.

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Connect an external monitor and see if that shows anything.

さんによる

Hello sir,

The other night I connected my Chromebook to an HP 20 inch external monitor and was still unable to view anything from both screens. I'm guessing that the LCD itself has some damages.

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