Hi Emmaz
I am sure Martin will correct me if I am wrong but I think you will only light the Stereo lamp if you are switched to radio and find a station broadcasting a stereo signal. The lamp is illuminated by the stereo decoder and will not light for other inputs.
Richard
Some of my B&O: BV3/32, MX7000, MX5500, LX5500, MX4000, BM8000, BM6000, Overture, BL8000, BM6000 Quad, BM4400, BM3400, BG-CDX, BM3000, BM1001, BM1200, BM1600, BM1700, BM1500, BM1400, BM2400, BM2300, BM4500, BM4000, BVM70, BVS45-2, BVS60, BC7700, BM2200, BM1900, BG8002, BM1202, BVPenta, BVP45