Yes it happens to all my tvs. Need a pre amp to get the signals. The antenna will work for hours fine I'll turn off the tvs and the next day it won't work. then I'll try again later and it will work. Don't have any trees or obstructions in the way. Could the pre amp be going bad? Here's my report.
http://www.tvfool.com/?option=com_wr...2c15a6c85912cb