I semi bricked my new Android Headunit, its so easy...

I have been trying the "factory settings" of my new Android headunit mainly to get it to boot up fast. At first it was until i changed some settings, and in trying to restore the settings i changed "power default on" to "off". Unit came without instructions so i was thinking that this setting would be, when you turn the ignition the radio would need to be manually turned on, not it would not turn on at all?..Ive tried a few suggestions like calling my phone and using a keyboard, this have not worked as the settings appears to be suddenly unclickable?..ive also tried a factory restore using the boot loader recovery . Unit was fantastic before i started messing with the settings.