Can someone help me with my black screen

Hey, so I tried to replace my iPhone 6s screen and once I’ve replaced it, it’s black and doesn’t seem to work. The phone still powers on and works but the screen is black and I’ve put back the old screen but that ones also black. I’m pretty sure I messed something up with the motherboard because I saw a tiny spark and like a cartoon waft of smoke come out.

Going to say this now I was an idiot and could have avoided this probably by one, looking more closely at the connecters and just moving them slightly, two, unplugging the battery (I was also replacing it so I had plugged a new one in), and three not pressing so hard but oh well.

I think this is the right phrasing for these,

Question 1: is it something I can fix without completely replacing the motherboard? because I need to get my portfolio off of my phone. I already have a replacement but I need my portfolio and like an idiot, I didn’t upload it anywhere because I was still working on it.

Question 2: If it is something that’s fixable who would I go to to get it looked at and fixed?

Also I don’t think it matters but the spark came from the area between a screen connector and the camera connector if that helps? With anything.

Sorry for such a long winded explanation for the 2 questions I’m just a bit mentally exhausted right now. Also terribly sorry if anything is worded poorly.