Charge port replaced, won't turn on anymore.

I was recently given an iPad by a family member. The charge port pins were bent and they bought a replacement part and installed it themselves. Unfortunately the iPad won't turn on anymore. I tested it with other screens that I know were good so I know that the original isn't bad. What could cause this? I know there is two cables that attach to the charge port themselves, but I don't think they are bad. What could be happening?

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