HDMI Problems with White Sparkles

I have talked quite a lot in previous posts regarding issues with HDMI. I want to elaborate just a bit more because it seems that 1 plus 1 often equals something other than 2. I have now seen more than once an installation where the HDMI was prewired into a wall and I have hooked up the system and there is an abundance of white snow or sparkles in the dark parts of the picture. It seems to happen when two devices are hooked up to each other and the two devices for what ever reason do not like each other, with the HDMI cable that you have used. Here is what I have learned. When faced with this problem, and in some cases you cannot change the wire, I have found that coupling the HDMI with another wire which does not have the problem in series with the problem cable that the “good” wire in conjunction with the wire which is giving you problems, can solve the issue with sparkles in the TV’s display. If you have a situation where a wire which you cannot replace is causing trouble try this. Please write and let me know about your experience if this helps, there is a contact page on the site or email jameselectronics@cox.net
I have now witnessed more than once where a HDMI wire which I proved to be bad in one installation works perfect in the next install. This is very difficult to manage and to me it means I carry an abundance of wires with me such that I can test things in different ways. I have also seen where changing HDMI wires seemingly solving the sparkle and or snow problem only to see it show up again as if something else is changing in the system. It may be due to changing resolutions (which I know can have a influence on this problem) to issues associated with the copyright protection on HDMI called HDCP. I can say that before HDCP was implemented that a HDMI wire or cable was either good or bad based on connections at each end of the cable. Now it seems that labeling a HDMI wire good or bad is a very difficult thing. I have cut up many wires that I proved to be bad in one installation, which I now realize had I simply used them on another install they would have worked fine. I have learned a one-sided proof is not proof.
This is similar to a speaker wire which, when you twist one end together and prove a short circuit on the other end, you must also prove that the two wires when open are indeed open.