I disassembled my MacBookPro 2,1 and baked the motherboard in the oven for 8 minutes at 350F (IIRC), supported on some pyramids of tinfoil.
It worked for another 1.5 years after that, but then died again and that was enough for me. I removed all the useful parts from it and moved on, giving it an honourable grave. It worked from 2007 to 2021, so I had nothing much to complain about I felt. If I was going to send it somewhere, I would have sent it to "dosdude" who seems to be the one who know the most about this at this point in time. For you, from Italy to the USA and back -- not very cost effective. Ken
