Using Windows 7 Home Premium Media Center, certain over the air channels won't record. The channels can be watched just fine, but if they are scheduled to record, or if manually try to record, the WMC screen goes blank and an error message appears stating, "Service Unavailable There is currently no TV signal detected for this channel. The channel may be temporarily off the air. Try again later." However, if the recording is canceled, within a few seconds the channel will display properly again.
Am using two AverMedia USB M039 hybrid ATSC tuners with the latest drivers
(The problem seems to be tied to the guide somehow. The channels used to not show up with any info in the guide [detected in setup, though], but could be watched and recorded (had to manually set the time and channel). Then, WMC updated the guide listings, but somehow had the channel settings fouled up so that the channels didn't work at all. Now, the channels work, and the program info appears correctly in the guide, but they won't record.)
Update--When editing the channels that won't record and selecting "Edit Sources", there are 4 sources listed for each channel instead of 2 (there are only 2 tuners)--evidently WMC has invalid channel info as only 2 of the sources work. All channels show this duplication, but only certain channels have the invalid info.
Is there a way to completely wipe out all the settings on channels so the invalid channel settings don't appear?