crwdns2934241:0crwdne2934241:0 why

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Why is my screen black?

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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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Sony Xperia X

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open