I've moved into a new house, and I'm experiencing some trouble with an ethernet socket in the wall. It's just a bit unstable; can lose internet if someone touches the cables. Also feels like it takes a while to get the network up and running when a connected machine boots up. Had trouble using a switch with this wall mount, it just won't receive any signal from the wall socket, so in the end I just connected it directly to a computer, which works alright, apart from the aforementioned problems.
I had a look at the wires, and discovered that it's a cat5-e cable that's been sliced open, four of the wires go to this socket, the remaining four go through the floor to a second socket downstairs. At the router's end, the cable splits into two separate RJ45 plugs, so it takes up two slots in the router, one for each wall socket.
I'm wondering whether it's this splitting of a single cable that's causing problems, or if perhaps it's just the wall socket itself that's slightly damaged. Intended use is to simply provide cabled internet to a htpc computer, and a smart tv.
Is it worth attempting to replace the socket, or is it definitely the splitting of the cable that's the issue?