I bought an hdmi splitter cable and am trying to output video/audio from my wii u to my tv and my computer using an Avermedia U3 capture card. Unfortunately whenever i try to split the audio and video from my Wii u it adds many red/blue lines to my TV screen, and my computer picks it up too. I was wondering if anybody else has had this problem and if they have a fix for it. PS: The splitter cable is not powered by an external power source. Just my Wii u. Another thing to note is that whenever i plug in the second hdmi cable to the splitter the TV screen goes black until i plug in my capture card to my computer via usb.