ChatBox 40-XT is On but pressing the keys won’t activate consistently:  If you are pressing keys on the face of the machine and they don’t activate consistently you may not have the keyboard sitting tightly enough against the machine.  Remove the keyguard, pick up the overlays and the keyboard.  Make sure that there isn’t any debris or crumbs keeping the keyboard from sitting flat against the face of the machine.  Replace the keyboard making sure that the holes for the lights are in the upper left corners of each key.  Replace the overlay and the keyguard.  Be sure the keyguard snaps into place securely.