How do I remove or disable PIN13 from one end of a HDMI cable. I just got an enhanced DVR(ARRIS DCX 3600XNG)from TWC.After installing I found that I lost CEC control from my Onkyo TX-NR 838 (AV Receiver)to my Vizio M43-C1( 4k flat screen tv).I also lost the ability of hearing sound through my system(I have a 3.0 speaker system)(The sound is ok through TV speakers)when I stream Netflix or Amazon.I have read on TWC forums of a fix for the CEC problem by disabling Pin13 on one end of the HDMI cable (the end that plugs into the Onkyo from the ARRIS DVR) What would be the best way to do this?