Originally Posted by sympatico19
TriMark it is! Thanks!
I've located the model info. It's a TriMark 540-0125 e-PAD Power Keypad
Now to just narrow down the source of the problem. I guess I'll start at the contact pins in the door frame and work my way through the system. From what I can tell so far I think the receiver unit is sealed in the door and I haven't had the opportunity to try and get to it.
The backlight and beep have nothing to do with the door contacts. The door contacts are powered from the control unit or a separate relay, depending on the age of the unit, and just actuate the door lock.
The pad should be backlit after any key is pressed. I'd look at power to it and the control unit first. Trimark has all their manuals online, which can help a lot!