Sebya

Hi, I read your reply, let me explain you, the reason why HP does a Full System Reinstallation is because: since (Supposing) your PC used to take the TV Tuner Card with Windows Media Center it is possible that the issue can be resolved, anyway to be honest with you I personally think that you had a Hardware issue, because if it was a Software issue, Why reinstalling the OS would not work??
Another thing is that HP sends a Hardware Diagnostics Tool, it is a tool in built with the PC, and it is very accurate, you can find it here: Start-->All Programs-->PC Help and Tools-->Hardware Diagnostics Tool.
With your old Card did some one of us tell you to Switch the Slot of the TV Tuner Card before doing the Recovery??
Did you run a Test with the HDT on the TV Tuner Card???
Did we tell you to uninstall the Microsoft.net Framework???
Did reinstall the Drivers using the HP Recovery Manager??
Did upgrade the Drivers before replacing the Card???, Using the HP Drivers Upgrade or the ones from the Original Manufacturer???
Did you install any Media Software to burn CDs or to use with a Digital Camera??
This maybe Stupid but it worked before for us: Did you run WMC as administrator???
Was there any chance to use another Program to watch TV???
I will need to answer me this questions, I will search for the Registry Entries of how they should be working Properly, besides the Name of your TV Tuner is not the Name you gave me, usually the Name is another, I will search that for you and will see if there are New Drivers in the original manufacturer webpage.