Dell Latitude ST 10 won't power on, any ideas?

My Dell Latitude ST 10 won't power on, any ideas?

I've already tried replacing the charging cable and the battery - still nothing

According to a Dell representative the problem is the charging port on the tablet which is soldered onto the motherboard and requires replacing the entire mother board to fix. I would like to know if anyone else has this problem and if you were able to successfully replace the motherboard. If so, some procedures would be greatly appreciated. A Link to a website to purchase the motherboard would be helpful

Thank you

DG