I replaced sceen, now there's sound but no picture

I replaced the screen on this phone twice now with no issues. This last time, I replaced the screen & powered on to hear the intro sound on a black screen. I’ve checked all connections & even re-attached the old screen (which just had a “dead spot”). Could it be the motherboard? Is this something repairable?

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I don’t know moto phone but with iphone it looks like a backlight destruction usually cause by a replacement with power available on mother board (battery still connected)

The battery was definitely unplugged when the part was replaced. I may have bent the component I plugged the screen into on the motherboard. Is there a way to get a specific part from the motherboard besides buying a used phone for the parts?

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