There is a small pushbutton on the front of the signal board best accessed from the front of the unit by removing the grill and access cover. You can reach in and hit it from the back though you best know where it is before you go prodding around the board with your finger.
There is a small pushbutton on the front of the signal board best accessed from the front of the unit by removing the grill and access cover. You can reach in and hit it from the back though you best know where it is before you go prodding around the board with your finger.