Hi, I currently have a model C4-16ZAMSV3-B Audio Matrix Switch, however i do not know if it works or not. When i plug in the ethernet port no lights come on to show any connectivity. The power and Ethernet cable are both working so I have concluded this is a problem with the AMS. Would i better off trying to repair the AMS or would it be better to buy a new one (if so, which would be a better ams to upgrade to?).