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Yes, I have an SMC model keypad. First off I want to thank you for your detailed message and the link on how to replace the batteries.
I went ahead and put in fresh CR2 batteries (waiting at least 1 minute after I took out the old ones out) since it's been awhile, however, the amber/yellow blinking light still shows up when pressing the unlock icon button on the wireless keypad which I've never seen before. I went ahead and restarted the main home security unit as well.
I will tell you that the amber/blinking light issue comes up only after the system has been unarmed for awhile. When I arm the system with the keypad and then return home and disarm the system with the keypad, the unlock icon button does show green. If I awhile, lets say at least 10 minutes, and decide to check the status of my unarmed system by pressing the unlock icon button, it blinks amber/yellow. Now this is different for me but if I press the " * " (star) button to the right of the unlock icon button, the unlock icon button turns green.
I think I'm good and will not require Xfinity service to come out and look at it. It might be a firmware update that was recently done which prompts me now to press the " * " (star) button instead of the unlock icon button to check the status. I will monitor it and see what happens.
I appreciate your help.