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Weak TV Signal message is erroneously displayed in Windows 7 Media Center

Consider the following scenario:
  • You have a Windows 7 computer configured with a digital TV tuner.
  • Windows Media Center is configured to use the digital TV tuner.
  • You launch Media Center and then choose Live TV to watch TV.
  • You change the channel.
In this scenario, soon after changing to a certain channel you may consistently see a message that resembles the following:

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.

This message can be erroneously displayed by Media Center under certain circumstances.
To resolve this issue, use one of the following methods to modify the registry.

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

To have us modify the registry for you, go to the "Fix it for me" section. If you prefer to modify the registry yourself, go to the "Let me fix it myself" section.

Fix it for me

To modify the registry automatically, click the Fix it button or link. Then click Run in the File Download dialog box, and follow the steps in the Fix it wizard.

  • Exit Windows Media Center before you run this Fix it solution.
  • This wizard may be in English only. However, the automatic fix also works for other language versions of Windows.
  • If you are not on the computer that has the problem, save the Fix it solution to a flash drive or a CD and then run it on the computer that has the problem.
  • After running the Fix it solution, if the PC is not restarted automatically, shut down Windows and restart the PC.

Then, go to the "Did this fix the problem?" section.

Let me fix it myself

Toresolve this issue yourself, use the following steps to modify the registry.
  1. Exit Windows Media Center.
  2. Click Start, type regedit in the Search box and press ENTER. If you are prompted with a User Account Control message, click Yes to continue.
  3. Locate and then select the following registry subkey:
  4. From the Registry Editor menu, click on Edit->New->Key. Change the name of the new key to BDA.
  5. Click on the newly created BDA key. From the Registry Editor menu, click on Edit->New->Key. Change the name of the new key to MSNP.
  6. Click on the newly created MSNP key. From the Registry Editor menu, click on Edit->New->DWORD (32-bit) Value. Change the name of the new value to WeakSignalDroppedThreshold.
  7. Right-click on WeakSignalDroppedThreshold and then click Modify. In the Value data box, type 32 and click on OK. (Leave the "Base" setting at the default, Hexadecimal.)
  8. On the Registry Editor menu, click on File and then Exit to exit Registry Editor.
  9. Shut down Windows and restart your PC.

Did this fix the problem?

  • Check whether the problem is fixed. If the problem is fixed, you are finished with this section. If the problem is not fixed, you can contact support.
  • We would appreciate your feedback. To provide feedback or to report any issues with this solution, please leave a comment on the "Fix it for me" blog or send us an email.
More information
The registry value WeakSignalDroppedThreshold specifies the maximum percentage of dropped packets before Media Center displays the Weak TV Signal message. If the registry value is not set, the default value is 10%. The steps in the Resolution section specify to set it to 50% (32 hexadecimal). The side effect of setting this to a higher value is that it may in some cases prevent a valid Weak TV Signal message from appearing while watching Live TV in Media Center. However, in the case of a valid weak signal it may be obvious to the user, due to dropped frames or other video artifacts, that there is a signal strength problem for that particular channel.

fixit fix it fixme
Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.

Article ID: 2708283 - Last Review: 04/08/2013 23:56:00 - Revision: 4.0

Windows 7 Enterprise, Windows 7 Home Premium, Windows 7 Professional, Windows 7 Ultimate

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