Computer Guy is right . . . first look at your home situation. We had a serious problem some time ago. Finally called Mexico City and they sent a technician. When he opened the "box" where the line from the pole tied into the line leading to the house, it was full of mud and moisture. He rewired the connection and I had him place a plastic baggie around the connection and securely wrap it with electric tape . . . that solved the problem, hopefully for the long run. I noted they do not even use wire nuts for the connections and the poor technician did not even have electric tape to seal the connection. I gave him a roll of tape as he left.