no start

I've read so many threads, forums and watched a ton of videos and am stuck. Perhaps folks on here can provide me several issues that may be what's causing mine. I purchased a 2005 QX56 a week ago. The vehicles previous owner was a fanatic about service and maintenance on the vehicle. I...

This was very unusual & wonder if anyone else has experienced this. 2012 G37x (3400 miles) had been in garage for 2 days. Would not start. The battery seemed to be completely dead..no interior lights, dash lights..nothing. Put my charger on the battery and it registered 0.5v, set charger on and...