I have an AC1900 Cable Router and 1 of the 4 ethernet ports has stopped working. It actually switches ports because I've had to unplug/replug my DTV several times into a different port. Way out of warranty obviously. Is there a way to test ports on a cable router? From the attached it looks like Lan 3. If I can't get this problem fixed I will never buy NG again since this is the 2nd router I've had problems with.
