Last week my 2012 Volt displayed an Initializing message after pressing the power button. I tried powering it off, even getting out of the car, closing the door and locking it. I decided to power it back on and call OnStar. After about 20 minutes, with it still displaying the initializing screen, I powered it off, waited 15 seconds and then powered it back on. This time it started up normally, but there was a malfunction light. The car was fortunately able to make it to the dealer. They reported that it needed a new $2,400 inverter (covered by the warranty). Has anyone run across this issue before?