iPhone SE is broke after charge in the car

Hi,

I used an adapter for charging iPhone SE in the car, but after 5 min the iPhone SE arrested forever also if I pushed “power” button. So, I decided to replace battery, but I noticed that problem is another. I noticed that also if I put the display of this iPhone SE to another iPhone SE, this display doesn’t work, so probably also display is broke. I tried to put also motherboard of 64 GB in the iPhone that born with 32 GB, I removed motherboard of 32 GB and I put the motherboard of 64 GB, but also motherboard doesn’t work. I’ve worry, because in the motherboard of 64 GB I’ve many importants data. Someone that is really expert can tell me what happened and if is possible recover my data?

Thank you in advance.