On my drive into work today MyGig turned on just fine, Nav worked but there was no audio from the unit for radio/sat/nav. I tried turning the unit on/off but nothing worked - could not turn vehicle off because I was driving.

As soon as I arrived at my destination I turned the jeep off, let it sit for a few minutes and then started it up - audio working fine this time.

Anyone ever have this happen?

 

i have had this happen, what i did notice was when i turned the volume control up. The display said "phone volume" this only happened twice and as you mentioned turning off for 30 seconds did the trick.