Should I replace the logic board? My MacBook don't recognize my SSD

The problem is that sometimes my Macbook don’t reconazie the SSD and I said sometimes because I can spent a whole day trying to turn it on but the only thing I see is the flashing folder, but then the next day when I try again turn on just fine. First, I thought the problem was the SSD so I bought a new one but I still have the same problem, so now I think is the logic board and I don’t if I just try to fix the part where the SSD conect or should I change the whole logic board or buy a new one