Side buttons and screen will not function after screen replacement

Title says it. None of the side buttons do anything anymore. Also put new screen on it, phone powers up but not the screen. I’ve done the basic troubleshooting checking the connectors and ensure clean. Carefully switched the sensor stuff over but can’t figure out why the screen won’t come on.

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Did you try to connect it to your computer? If it shows up in iTunes then restore it to see if that solves the issue. If there's data in it then back it up first.

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Did the side buttons function at all before replacing the screen?

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