Microsoft has released a Fixit patch for Media Center on Windows 7 for people who might (erroneously) receive the following message while trying to enjoy TV.
Weak TV Signal
The TV tuner is unable to receive the signal for the channel you have selected. Adjustment to the signal may be necessary to receive this channel reliably. Please try to select this channel again. If the problem persists, contact your TV service provider.
This message is displayed even though the signal is not weak and there does not appear to be any noticeable dropped frames or loss in video quality.
You can grab the (KB2708283) patch right here.
That is all.