I'm at a loss on this one and starting to think there's something internally wrong inside the TV itself. It's a Sharp Aquos 42 from 2007 think it's model LC42D64U but I'll have to check later. Within the last year it's started losing it's reception on start up and typically it would clear once the TV warmed up. Not everyday but lately it has been acting up everyday and now it's several times a day. It you watch the digital antenna setup in the menu it'll drop to 0 and back up to 80's where it normally is.
Initially I thought it was the antenna getting water in the connections so I replaced the antenna and sealed everything to no avail Still losing connection even with everything dry. We do have 2 other TV's tied to this antenna via a 3 way spliter and both are fine, LG 32 (2011) and one with a digital converter. So it seems to me it's the Aquos itself. Are there any internal boards that can be replaced? The rest of TV seems to be just a good as it was back in 07!