My HR20 in the family room is suddenly showing "searching for signal" on two channels: SyFy and TNT. These are the only two channels with this problem, and it's only on the family room HR20. I have another HR20 in the bedroom and it picks up those two channels fine and dandy. I've checked all cable connections (they're all fine) and done a red button reset. No luck. Still can't get those two channels in the family room. Anyone have some insight into what's going on here? Thanks!