Quote:
Originally Posted by Matlock
I am an electrician. If it's straight down and there is an actual existing hole it should be pretty easy to fish in some more cables without doing any damage to the wall if there is no insulation.
You could always improvise by first fishing in a string with a weight at the end or use some sort of wire that is a little bit more ridgid and then use it as a pull string to tie your hdmi cable onto after you get from hole to hole.

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Its actually going at an angle which will be hard to fish through but I've done it before even with insulation. I can work something out. Worst case scenario I will have to buy a HDMI Switch.