Two different TV tuner cards have worked fine for me so far. AND they are the ebay cheapies... never had a hitch with em!

If updating all the drivers don't work, try uninstall/reinstall the tuner software.

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MY99 WRX sedan WRC blue Sold :(
MY99 WRX sedan Dark blue pearl :D
MY97 Liberty Outback Ltd Wagon
1990 Mk3 Supra turbo fully rebuilt 7M-GTE (Older son)
1991 Celica GT4 (Younger son)