Hanslux

Hey The volume in my n80 (factory JBL car play head unit) has stopped working. Everything still has full functionality including car play yet no sound comes out of the speakers. When you turn the volume knob or use the steering wheel control the volume number comes up but it won’t move (always stuck on 20). I Have disconnected the battery and done a personal settings reset yet it still hasn’t fixed it. Anyone had anything similar and have any ideas on how to fix it?