A method for providing an indicator to a dispatcher of traffic on a shared multi-talkgroup channel is provided. The present invention not only uses a ferrite bead that is serially connected with the power source of the clock buffer to protect the clock buffer from electro-magnetic interference. At least one resistance device is interconnected between the pivot arms and the frame. Thus, the exemplary embodiments of the present invention provide a power saving method of an office machine which prevents unnecessary power consumption during an operation of an office machine having a display panel.