15.6 screen blank and 10.1 screen ok

If I connect the 15.6 screen in dell n5010 screen r blank but if connect 10.1 screen so display is ok

I don't know how do the repair this falt

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crwdns2889612:0crwdne2889612:0 0

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Your question is not clear. are you saying there is no image on the laptop screen but there is an image on an external monitor?

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