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enough video RAM to hold the TV image. In this case, resorts to Primary
Surface mode, which lowers image quality. A memory upgrade on your VGA dis-
play adapter might fix this problem.
Another possible cause of this problem could be that your VGA display adapter
does not support Windows 98 Direct Draw. In this case, you might consider an
upgrade to a new Windows VGA accelerator which has Direct Draw support and
is compatible with the USB.
A poor video picture might also indicate a bad signal. To verify a bad signal, try
one or more of these:
Move your antenna or check your cable connection.
Move possible interference sources, such as other computers or television sets,
away from your PC.
Contact the cable company to check your signal quality.
Problem: TV picture displays a black screen
The TV picture might display a black screen under the following conditions:
Momentary loss of signal
A weak video signal
Channel changing
A scrambled channel
Changing channels may cause a temporary black screen. To
fix the problem, switch the channel up or down, then return to
the original channel.
The audio might continue to broadcast, even though the video picture displays a
black screen. This indicates a strong audio signal and a weak video signal.
A scrambled channel is not a valid channel: Set Primary.exe to DIBDRAW Mode!
Problem: Snapshots don't display correctly
When using a 256 color palette, snapshots display incorrectly. To correct the problem, try one
or both of these:
Change your Windows color palette to 16-bit.
Copy the image to a graphics program and save the image as a 24-bit image.
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WinTV-USB Installation and Reference Manual