HELP! I have a 2012 G37 convertible. My battery died after I accidentally left the dome light on. After jumping the battery off I am unable to control the radio and heating/air , the back up camera is not working, and after I get out of the car if locked or not there is a beeping (I read this beeping could be a dead key fob battery?). The screen for the radio/nav says check USB/ ipod and heating/air buttons not working. Can anyone tell me what to do?? Thanks in advance!