2003 X5 no audio after battery replacement?

Hello bimmer friends. After new battery install in my 2003 X5 the audio is completely absent. No Prior issues with sound system and everything is factory. The radio still turns on and displays show normally, it can scan through stations and adjust settings/volume like always, but no sound. There is no crackling or buzzing or anything like that, just total silence in any mode, CD, radio, Bluetooth adapter.. silence. It doesn't ask for a radio unlock code or give me an option to enter one. Any ideas? Could it be an Amp issue? I've checked all the fuses, and there are no relevant codes showing in diagnostic... I can't afford a professional repair for a non-essential issue like this -keeping it on the road in one piece is bankrupting me as it is. Any advice would be greatly appreciated! Its been like this for months and im going crazy from long, silent drives when I forget my headphones....