Winfast tv2000 xp sound but no picture

I have a winfast tv2000 xp tv card and just lately when using it i get sound but just a black screen all the channel audio is correct,ive tried reloading the software and drivers but no joy, anybody out there with the same problem.Also using other software like descaler the picture appears correctly.

Have you selected tuner or whatever you’re using as input?

Thanks but i managed to get it right,it was the drivers ,they didnt uninstall so i removed them and then removed the rest of the card from device manager reinstalled new drivers by pointing the new hardware wizard at them and telling it to install anyway (cos theyre not signed) then the latest version of pvr all is now ok,thanks for your reply.