That is strange. Maybe the enclosure power supply has been damaged? Although 3.5" enclosures typically have 12V power supplies as 3.5" HHDs require 12V and 5V supply, 2.5" SSDs only require 5V. So maybe a faulty power supply could be to blame. It could of course be the controller itself.
Running multiple nodes on the same machine is unfortunately not straight forward in Windows. I suggest checking out @Vadim’s Win GUI toolbox
Not sure how to migrate a node with it though, as I have only read about people using it to set up new nodes. Hopefully someone on the forum has experience migrating a node this way. Just make sure to keep your data and identity for the respective nodes together so you don’t accidentally run a node with mismatched identity/data.
It’s worth mentioning that the officially supported way to run multiple nodes on Windows is to run additional nodes in docker, but I’ve heard that docker on windows is a nightmare.