Why is my screen black?

I replaced the display module of my sony xperia x. It turns on and the back light seems to be working (i can see that on the inside), but the screen remains black. What could the problem be? Obviously it’s not the lcd since I just replaced that. Please help me…

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check the connectors of the LCD. It may be damaged or not making proper contacts. Check the connector it may have foreign objects that result to poor connection

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