I just purchased a second hand hwt130, it works fine apart from one annoyance, I want to route it through a 4 x 2 hdmi switch but it won't give an output. It works direct to the tv but not through any type of splitter even a 1 x 2. Is there any means of overcoming this please. I've read about a limit on more than 4 hdmi connections? But I have fewer than this.