I'm back with some new details: Power supply unit has a burned transformator. Where to find a B&O 8013529 QC9416 complete power unit?

Hi, just new on this forum. My Beocenter 9300 died yesterday, no power at all. While looking for a common problem, I didn't find some probant problems with the power supply5on the internet/beo forum). It's a Beocenter9300 with EUR specs(230V) , I read something about " replacement of a lithium battery" , but didn't find that in