Does anyone know what I need to replace if the power to both my wall button and safety beam are running at too low a voltage to operate them. I have low voltage 3-6 volts coming off the terminals on the unit itself. I touched the terminals with my battery charger and it causes them to both work/light up. I replaced the circuit board and it did not fix the problem. I have an older Overhead Door Signature Series screw drive unit. Any help is much appreciated! Could it be the receiver board?
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