Swapping the SSD controller without data loss possible?

Solution 1:

If you're thinking about "fixing" a bad SSD by replacing its controller chip, this is a BAD idea.

This operations requires exact knowledge of the SSD, both for the extraction of the chip and for installation as regarding the required temperatures, and also some costly professional-level tools.

It's not for nothing that these onboard components are soldered by automated machinery that can work with a much higher precision than the unsteady human hand.

The boards themselves can have several layers of copper, so attempting to do this by hand basically involves a very high chance to destroy the motherboard as well as the chip if you take a soldering iron to them.