Recover data from broken motherboard

Hi everyone, I have some data on my phone that I want to recover.

One day my s6 fell and it just died, no screen cracks no bents nothing, It just died.

I suspect it's the motherboard, but my condition is different from anything I found on this site:my phone still charges up, the display is completely dark and the phone doesn't connect to the pc but the led lights up accordingly if I'm charging it or if it's on.

Also, when I turn it on, the led lights up and stays on like if the phone is trying to boot up, but it never stops.

How can I recover data from this situation?