This is my first 850 - I've had her for about a month, so a few days ago, I installed a new head unit, rear speakers and a 250watt amplifier + subwoofer. I've had no prior issues starting up the car, and I'm lucky enough to have all of it's service records! The other night, while heading out of downtown (2nd/burnside) all the dash lights come on, and she just dies... I get a jump start and she makes it home, but won't start up the next morning, nor the day after, not even on a jump... she cranks, but wont fire... there is a pretty significant buzz/hum noise coming from the front/center part of the engine... that's about all I've got for symptoms. I pulled the fuel pump relay, and checked the fuses... both check out. It's on a trickle charge now... we'll try again tonight... I'm at a loss...

It's been super cold and rainy... new stereo... any ideas?

Thanks, Michael PDX