My rental house is wired with ethernet in every room, problem is, it doesnt work. Ive tried connecting my modem to the wall, and a laptop directly into the switch, nothing. Also tried connecting the modem directly into the switch and then tested the rooms and again nothing. Im also pretty sure i even tested directly into the switch the modem, and laptop into same switch and didnt get anything. Is there some way for me to test if there is ANY signal at all getting through these switches? Ive contacted the land lord and they dont seem very interested in helping us resolve the issue (its a rental company hired by the owners, not the owners themselves)