Should I swap my motherboard?

My left joycon still won’t charge or register as connected. I ordered and replaced my left rail on my switch. I have tried a second joycon; no go. I’ve messed with all the power options. I took apart a second switch and use it’s left rail to make sure I didn’t get a bad rail. The rail still didn’t work. I’m starting to think motherboard. Is that the next big thing I should swapped?