Thanks for that Arthur! Problem is, I can't disconnect the wires of the faulty jack from the source end, because the source end is somewhere inside my walls. Where, I don't know.
What I know is this: There are three jacks inside my home, where two of them (living room and kitchen) are dependent upon each other, one of them being the faulty jack. Meaning if I have white/blue terminated on one end, and open on the other, the terminated end will not work.
The third jack, in the bedroom, and connected in series with the demarcation point (which is also in the bedroom) makes the other two jacks "live" (provided there's no open between them), when connected to the demarcation point.
I'm thinking there's some kind of a junction point connecting the bedroom jack with the other two, but where that junction point is, I don't know, as it is in the walls somewhere.
