Join Date: Feb 2011
Location: United Kingdom
I have a similar issue on occasion with an aftermarket JVC AVX-840, had it shut off a few times mid-use (Not up loud or anything either), and it won't come back on even after turning ignition off the on. Removing the fuse and replacing resolves the issue (Although it's the fuse in the engine bay not in the dash) - most annoying thing is it resets all the settings, background wallpaper, demo mode, etc.
It was a bugger to fit so I'm loathed to do any serious investigations unless it gets any worse.
Know this hasn't helped, but just wanted to share that you're not alone! Don't think the fuse has ever gone though, just needs a reset.