Windows 7 Media Center - no TV Signal on some channels

Used to receive channels 7.1 with many others, but now W.M.C. indicates "Not of TV Signal" channel.

Using an indoor antenna, coax input tuner USB Hauppauge WinTV-HVR - 950Q, and have also installed Hauppauge WinTV v7 associate.  7.1 channel is very well received and all the other available local using WinTV program, but do not using W.M.C.

W.M.C. and WinTV would block the other off course, so they can be open at once.  When WinTV is closed and W.M.C. is open, shows W.M.C. 7.1 is indeed activated and the signal strength is 6 bar, like all other local channels.  Always 'No Signal TV"in W.M.C. When you try to view 7.1.

Repeat the "Scan for more channels" and "Set Up TV Signal" does not solve the problem.

Ideas, anyone?

Mr. Kumar,

Thanks for the attempt, but this response does not address the details of the question.

Channel 7.1 (and 7.2) be fine when I use WinTV and W.M.C. contains a signal strength of strong six - bar for these two channels.

All the cables and connections are apparently working properly as WinTV works very well.

W.M.C. has indeed received these two channels correctly in the past, but not now.  It receives all available channels correctly, like WinTV.

This seems to be something wrong internally within W.M.C.

Is it possible to uninstall and reinstall W.M.C.?

Hey there. I had the same problem after installing a new, more powerful antenna. All channels have great strength and quality but 7.1 and 7.2 in the Boston area would behave as if it had a weak signal. After many search my solution was to effectively reduce the output of my power amp. This is an article from Radio Shack (http://www.radioshack.com/product/index.jsp?productId=3780245) containing a gain knob. I declined a bit and everything was fine. If you do not gain control, try to use an attenuator to inline like this (http://www.solidsignal.com/pview.asp?p=1296f&d=antennas-direct-20db-variable-attenuator-for-vhf-uhf-hd-off-air-reception-1296f&sku=853748001293). I hope this helps.

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