My Macbook has defect RAM, so it won't run correctly. Now it also tells me, that something is wrong with my SSD (M.2-version). But it will not run a complete disk test - probably because of the ram-issue. ifixit shows that you can remove the ssd. Is it possible to place that into an external M.2 USB device and run it on another mac to check the ssd?
I ask that because my idea is the following: If the ssd is still ok, than I probably would try to change the logic board (because I cannot change the ram only), put the ssd back in and have a working macbook again. But if the ssd is defect as well, it does not make any sense to switch that too. That's just too expensive.