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Flashing display

I have hooked up my HP Presario m8530f desktop (Nvidia 9300GSO) via a HDMI line to my new Sharp Quatron 46" LED-LCD TV.

Before this I had a few issues with flashing display until I got it hooked up to the correct HDMI slot and the settings adjusted and everything appeared to be fine..

Last night for the first time I tried to watch a DVD (Potter Half-blood Prince) on it and the display started flashing to snow and garble again and I couldn't stop it until I shut down the PC.

Every time I tried to play ANY other DVD I got the same response.and I couldn't use the PC until I left it shut down for a few minutes.

Am I over-stressing the video card? I'd appreciate some guidance on what might be happening here.
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More about flashing display
  1. I was using it with 32" Samsung 60Hz 720p LCD TV before this and never had a problem.
  2. Sorry Pavilion not Presario - wrong Pc (I have both).
  3. I fixed it. HP had the virtualization disabled as a default in the bios. Apparently this reduced the capabilities of the support for the 9300 GE card too much to drive the higher resolution TV.
  4. Best answer
    This topic has been closed by Mousemonkey
  5. Best answer selected by wayneepalmer.
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