The present invention relates to a method of and an apparatus for multiplexing a number of video signals, in which to save circuits for compressors the video signals are reduced in their information, combined into a single video signal, and then the video signal is compressed by one compressor. Some of these activities include chatting, viewing andor editing one or more data files, and sharing one or more applications, data files, andor displays. The liquid-cooling heat dissipation module includes a fan, a pump, a heat sink, and a guide member. The solder mask layer is formed over the semi-finished substrate to cover the circuit line. The first and second sets of messages communicated between the portable electronic device and the accessory interface may be formatted in accordance with the same data exchange pattern. The printing apparatus provided with three different color inks, cyan, magenta yellow, as the multiple chromatic color inks, enables color images to be printed.