Does it ring when you change the volume of the "ring" through the menu?
The Beocom 4 had at some point an issue, the little speaker broke and had to be replaced. Was quite common for the early ones. For Beocom 2 though, I never heard of that.
BS9000, BS2300, BC2, BL2500, BL3, Bl2, BS1, BV8, BC4, A8