Hello everyone. I'm new to this forum, so I apologize in advance if I upset anyone with my first post!

I have a problem I've never encountered before in 40 years of motoring. My 2007 Crossfire Roadster is completely dead, but the (2-month old) battery is totally fine. Thinking this was a flat battery issue I tried charging it, but both of my chargers say it is in tip-top condition and fully charged. I then tried jump starting the Xfire, but still totally dead. FULL DISCLOSURE: I stupidly left the trunk lid open overnight, but never thought the small courtesy light on the trunk lid could cause this. And anyway, wouldn't that just deplete the battery?

Could it be the main fuse has failed? Or does the Xfire have some strange 'you-left-the-trunk-open-you-idiot' fail safe?

Any help with this would be most appreciated. Thanks!