Oh my,.. I hope you have a better experience than I did!
I took mine in for the light flickering when set on low IP light setting, and they pulled it out,.. and the truck sat for almost 2 weeks. Lucky for me, I have accesss to company trucks, but after the second week I demanded a new unit. Well the "new" unit lasted all of 5 miles down the road and began to lock up and turn on & off by itself. Not just your power loss symptoms, it would turn on/off with the seek button, or all buttons would go dead! Then the battery went dead over the weekend!
After screaming about it, and demanding another new one, they had the truck 3 days, and then I demanded one be pulled out of a stock AV at the dealer.
Radio works fine now, but even the new one has the flickering back light when IP dimmer is real low.
I just live with it.