Have a run to a detached garage that has been in about a year. Suddenly the connection is bad. I have surge suppressors on both ends but it seems the issue is in the cable run itself. I was out of town but it looks to have happened about the time of a 30 minute utility outage but not sure it is related. No severe storms in the area that I could tell. The connection to the router works fine at the equipment in the house and at the other end nothing (using equipment that works in other locations). The lights by the network connector flash briefly when the cable is plugged in but then go out and stay out when normally one would light and the other would flash. It's a buried line in conduit so physical damage seems unlikely. I will be checking for shorts and opens and if I find anything wrong do a TDR test to determine the location of the issue. Thought I would post here for any ideas on testing or what might have happened.