Dead

I have a 92 Buick Century, v-6,auto,Pwr windows & door locks, air, pwr trunk release, am/fm/cassette player, I just replaced the door handle in the drivers side door. Cranked the car checked everything and it operated as it should ( or so I thought). The problem is my wife gets in cranks car and turns on headlights, she hears a buzzing sounds as she describes it, ( I didn't hear it) so she shuts off car. Try's to start it again, but alas no pwr coming into car. I have checked all fuses in the glove box with a meter, all appear to be good. Is there a main fuse somewhere I'm missing. Any thoughts or ideas would be greatly appreciated, thanks in advance for your time and any help that can be provided.

Check the battery and the battery cables for loose or corroded. Do you have power to anything ? Could be a fuseable link.

Thanks for the info, finally found fuseable link that had been added by a previous owner at some point. Found skint wire and repaired and replaced fuse. Century is alive!!!!!!!!!!!!!!! once again.