AMR 130 will not power up at all

Hi I have an old AMR 130 with all six speakers and all the original cords. For some reason it no longer powers on at all - absolutely nothing happens when plugged in. Does anyone know if there is any known issues with the system, or it has a breaker, or a reset (can't find a reset button) or I should just buy a new ac adapter and see if that works? Thanks
Stephen