PX6600 has 'snow' on HDTV when changing applications

[seanslife]

G'Day all

After being forced to a complete MCE reinstall due to a HDD corrupt I have a new problem. The Leadtek px6600 that was working fine previously now has a sort of coloured snow effect when I switch between apps or back into MCE. eg I will minimise MCE and the screen will 'reset' or somehing with this snow effect and then be all good until say I select the properties option on the desktop then it happens again. I am using component cables to connect to my pioneer 43" plasma. I have tried the following:

Using most up to date drivers (163.75)
Deleting all drivers and starting with original drivers (77.77)
Using the VGA cable as the primary and the component cables as secondary screen
Having VGA as sole screen (this has proven that the problem exists only on HDTV out side although there does seem to be some 'stalling' or blanking that goes on when selecting a different app)

Is it the card is coincidentally failing?
The cables seems fine.
The PC seems fine.
The video card is not hot at all

Thoughts?

Sean

[seanslife]

Hvae found a way to avoid 'snow' ... but has bad implications for MCE:

Run windows decoder checker and found that MCE is using the cyberlink DVD 5.0 decoders
Open Cyberlink DVD 5.0 and disable video acceleration and enable CLEV
Go to windows video properties and disable hardware acceleration.
...no more 'snow' interestingly the nvidia icon is missing from the windows toolbar now
Of course the issue here is that now MCE complains my video card or drivers are not compliant for MCE. Enable hardware acceleration again and the warning goes away from MCE but the 'snow' comes back...as does the nvidia icon and manager again.

...starting to sound like the nvidia manager is causing some 'redraw' issues, anyone heard of such a problem?

Sean