If you get the Start-up tutorial from the KB at the Support page, it will tell you to turn ON the radios not too long after turning the battery ON. I have got into a habit of turning them on after turning on the panel lights. For me this is the third step (battery, panel lights, radios).

I actually found a good start-up tutorial, which I prefer to the one mentioned above, by doing a google search. Same as above when it comes to radios. It tells you to turn them ON not long after the battery.

We all live and learn. ;)

Mark