I end up getting out the Ohm meter and check it out wire by wire. At 15 feet I also just use a pre-made cable as a sanity test.
I ran a new cat 5e cable run around 15 feet terminating one end on my patch panel & the other in an RJ45 wall jack using 586B. I have other Cat 5e runs (20 runs throughout the home with no issues) of the same configuration but this new run is not working. I tried using different & new RJ45 Jacks, different ports on the patch panel, but nothing is working. All input is welcomed