First of all: best wishes for 2023
Sometimes the BP25 led stays red after switching on (so not turning fully on/green led after hearing the 'stabilsation click').
Most of the times decoupling all cables (for power and audio signal) and reconnecting the cables will solve this problem, my question what is going on?
Red means 'muted' but is something wrong with the preamp or the external power supply (MPS-1)??