Ive got a Sapphire 3850, Im using it now with my 1080P HD television and it works just fine. Might not have a high enough signal to trigger the TV or something. Have a look through the TV settings.
The only issue I have is Sapphire provided a HD audio driver, which is presently disabled as I cant hear games through the headphones socket on the front with it. The motheboard has its own HD audio driver.
Ill carry on digging, maybe give Sapphire and Sharp a call.
i guess re setting cmos will give me the onboard video back if i remove the 3870 and ill just use the onboard until i find out the cause of the problem.
Can anyone suggest Blueray playback software compatable with the Intel X3500 graphics? PowerDVD 7 only recognises ATI and Nvidia cards :/