3 month old Passport. Wont start. tried to charge the battery (with both a battery and a jump start) and nothing. only sign of life is the on/off button pulses and the thermometer & fuel gage background light pulse on and then off when you press on/off. then nothing. no turn of engine, no dashboard lights. nothing. must be some anti-theft or something? Key fob will lock/unock (but no beep). tried both key fobs, and held them close etc. Help!