Haha, what are the odds? About 2 weeks ago I delved into the 'add-on' arena with Diversion, YazFi & uiDivStats. The system status CPU was showing a resting state of between 20%-30% even after a few hours.
I uninstalled & reinstalled uiDivStats with no change so decided to uninstall it.
About...
When logged in to the GUI, up the top there should be a green wifi icon along with other icons for guest network, network and USB. If not lit and no LED activity on case then yeah, most likely the radios are cooked.
I had near same situation last week except in my case only the 2.4Ghz died on...