MacBook Pro not Powering (A1706)

Hi, I have a Macbook pro 2017 (touch bar model) it's been on the fritz for awhile with certain USB ports stopping working and the touch bar completely disappearing now and again, the battery has long been dead and it basically only runs wired into the mains.

Last week it started turning off completely and then would not power on at all regardless what charger was used- to note it wouldn't power on at all, I can tell as the trackpad wont click on. On occasion it would turn on then would shut down on login before it managed to load, on a couple of occasions it has managed to login and works normally until it powers off and wont turn on again. I havent managed to boot into safe mode as i haven't managed to turn it on recently as that would be my first go to.

I've passed it to a third party tech to check what's wrong with it, he says USB boards were working (therefore powering the mac) and thinks it's a software issue. Now to me, i've had macs die on me for software reasons in the past and it's never stopped them from powering up (usually resulting in the ? folder) so to me this is a hardware issue clearly- which is important as I really need the data on the harddrive, I don't think it's a software issue.

I know the SSDs on these models are soldered on and so not changeable per se is there any way at all I could buy the same model of macbook pro and swap this harddrive or board into it (professionally) so I can keep the data on the harddrive? Thanks