@foone does the documentation mention a password? I just remember when a bunch were installed in North Bay Village, across from the WSVN studio, and they all periodically said "change password!".
If it were working you'd also get a nice haptic feedback thump from the button after pressing it. As I recall if you continued touching it, it'd make a series of thumps to signal that the walk sign is on for someone who cannot see or hear the signals!