Replacing midframe other phone

To be precise my phone is the Samsung Galaxy S3 NEO.

So I posted a question a couple of day ago explaining wanting to interchange displays between a bricked phone and a phone of which its screen was heavily damaged.

Like explained in the answer I got I took the bricked phone's midframe and put in it the motherboard of the stil working phone. Problem is it appears to still be bricked:

I succesfully flashed a stock rom via Odin(v3.07) but the screen remains unresponsive.

Could it be that the other components relating to the screen etc. are also corrupt/bricked? If so is there a way to further disassemble it so I'm left with just the screen?

Thanks in advance for your help.

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