I have an Altec Lansing speaker system ( model MX5021), that quit working. Does anyone know where I could get a schematic for the board or possibly purchase a new board. There seems to be power on the board as I have measured the output from what appears to be voltage regulators. I am getting a positive voltage out from one of the regulators and a negative voltage from the other. They both are approx. 9 volts. I can hear a faint hum form the speaks and when measuring the voltage regulators I hear what appears to be a little hum when I touch the meter lead to the regulator. I don't see any visible signs of damaged caps or any other components on the board. Any help would be appreciated.
Thank you
Thank you