Perhaps you made a mistake when editing this file. You have to respect json's text formatting and be sure to not introduce unwanted invisible characters, such as windows style cr/lf end of line, perhaps there is an extra or missing , etc, pay close attention.
Also make sure to be using normal bos from June, not the testing versions.
If possible check again connecting the fans and reverting the changes in cgminer.conf (just let them spin outside the tank) to make sure the problem lies there and not elsewhere.
That is a likely possibility... also thinking maybe the boards are fried. I'm right by the ocean and some days during summer can be quite humid hence why the move to immersion. I have gone about connecting the fans again and letting it spin up and only after it runs fine edit the code. So far 2 are running nicely now without any fans.
Thanks for the assist and yes, waiting patiently for bos.