I just figured out my OTA channels and they are great except for two/ One I get a perfect picture but no sound. The other is one channel that has only the yellow screen saying it is obtaining signal but no signal. All of my other HD OTA channels come through with no problem. Just these two. I am in the Sacramento/Stockton DMA and the two problem channels are KOVR, nothing at all, and KMAX31(UPN), great picture no sound though. It has to be something simple but I can't figure it out. Oh by the way my signal strenghth on KOVR is in the 80s. Thanks