Replacement screen not working

I replaced my screen (the whole thing) by following a YouTube video.

I did it exactly but when I turn it on the computer boots but the screen is blank. I removed the new screen and replaced it (exactly as before) the old (cracked) screen worked. I took it off and replaced it the new screen (exactly the same) - no screen - blank.

Any suggestions? Thanks

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@sasailor Where did you buy this replacement screen at? eBay? Amazon? AliExpress?

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I'm with Aaron here you likely got either the wrong one or a bad one.

Make sure its Apple P/N 661-6529

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