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.
Toresolve this issue yourself, use the following steps to modify the registry.
Exit Windows Media Center.
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.
Locate and then select the following registry subkey: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DirectShow\Debug
From the Registry Editor menu, click on Edit->New->Key. Change the name of the new key to BDA.
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.
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.
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.)
On the Registry Editor menu, click on File and then Exit to exit Registry Editor.
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.
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