One of my ADT Safewatch Pro 3000 keypads has suddenly stopped working. It’s not responding when I press the keys—no numbers are being input, and there’s no sound. The keypad’s green light is still on, but that’s it. Meanwhile, the other keypad works fine; I hear the button clicks, and it turns red when I enter the code. It was functioning perfectly just a few minutes ago, so I’m baffled.
Has anyone experienced something like this or have any suggestions?