I have never had any electrical problems, and my 2004 Z has never been in an accident.

Suddenly, with no advance problems or warning, my windows, dash lights, and radio ceased working. I checked all the fuses and they are okay.

I can put the window down with the key.

Anyone experience a similiar situation?

Fuses ARE OKAY . . . could it be a BCM (body control module) failure?

 

Did you check the fuses/fusible links in the engine compartment too? Actually, they are behind the battery. I'd suspect one of them in the case of a widespread power failure.