I recently purchased this remote control power switch for my PC as it is located in an inconvenient place. The cable is only 4 ft. long however. I thought I could extend it by using an HDMI extension cable (that's only the connection they use--no video), but this did not work. Are there different HDMI specs? Would another HDMI cable extender possibly work? Is there another solution with a longer cable? All of the ones I've found have been pretty short (6 ft. max). I seem to remember another thread on here where someone said they extended the cables of a similar product by soldering an ethernet cable, but I can't find the thread. Any other solutions?