I have a 1080p plasma TV connected to a GeForce FX 5500 thru an DVI to HDMI adaptor and a hi speed HDMI cable. The TV is set to 1920X1080 resolution (1080p) under Windows and it display the desktop perfectly, but when any video playback is started (SD or HD) the TV starts to flicker and then says that there is no DVI/HDMI connection made. If the the video playback is stopped using the keyboard the picture of the paused video shows on the screen until the video playback is resumed. If any other resolution is set under Windows everything goes fine. Do you know what could be happening? Thank you