Chosen Solution
First, out of the blue, the display screen showed the Power Level counting down repeatedly (P 10, P 9…) while at the same time the speaker was sending out a continuous beep, beep, beep. When I unplugged the device for a couple minutes, then plugged the power cable back into the socket, the display came up flashing and showed 88:88. I pressed every button on the keypad and only the Reset button worked clearing the display and showed : and again none of the keys on the keypad worked. Anyone have any ideas? I’m thinking maybe the keypad failed or possibly the microprocessor. Is this even fixable?
@flasharoo since there are no schematics for the keypads, it might be difficult to repair those. From what you are telling us, it sounds like a bad keypad. Of course, check it for any obviously failed component and post pictures. That way we might identify what may have gone wrong. Adding images to an existing question
