If you are using Joomla 3.0 with the ISIS administrator template, and have installed some modules and themes like JA T3 Framework or GANTRY Framework, you might notice that radio switch buttons in your administration panel do not show their state.
Here is a screenshot of how settings “Hide / Show” buttons might show:
Joomla Settings Switch buttons no state
This can be fixed easily:
Edit the file:

 JOOMLA_ROOT/administrator/templates/isis/js/template.js

Change the line (around 35) from:

 $(".btn-group input[checked=checked]").each(function()

to

 $(".btn-group input:checked").each(function()

Here is what you will have once you reload your admin page:
Joomla ISIS template radio switch working correctly
The issue resides in the method the function checks if a radio button is checked or not. This update is needed in Joomla ISIS template so that the “:checked” selector is used.