What’s the chance that I have a bad RJ-45 jack? What’s the QC like on them? The one I’m using is similar to the one described here. I just put in a CAT-5e run, and can’t get it to work (about sixty-five feet). All the wires have continuity, and there don’t appear to be any shorts, but there’s no signal through the cable. Any ideas what the problem might be or how to troubleshoot?