I have a Davis, Vantage Pro 2, and it developed a problem in reporting wind direction. Started out showing only NW to N, then just N... I asked here, and some kind folks suggested a number of items. All of which pointed to the sensor on the arm of the ISS. It struck me that the issue might just be a bit of corrosion on one of the connectors. I gave the cable a decent pull, and all is working now... So... Next clean up, (probably in a month or so), I will clean all connectors, and jacks, then add dielectric grease and reconnect all. Just wanted to thank everyone for the suggestions and the help.