Anyone have this problem with their Shaker 500?

When I turn off the radio, and later turn it back on, it just plays dead. I keep trying to turn it on, but nothing happens. Then, 2-5 minutes later, it turns on by itself.
I'm taking the 'stang into the dealership for maintenance anyway, but was wondering if anyone had the same problem and what was done to correct it.

Thanks,
Brchan

 

I have that same exact problem with my shaker 500, at first I thought it was the cd or something