I have a series 3 HD connected to a sony KDSR60XBR2 tv via HDMI. The screen goes blank for about 4 seconds whenever Tivo is switching from the menu system to video or vice versa. E.g. while viewing a recorded program I press the tivo button, I see the menu text scroll horizontally in for a split second, then the screen goes blank. 4 seconds later the screen comes back and I see the tivo main menu. After I select a program and select "play", the screen goes blank and 4 seconds later the program is playing on screen. Does anyone know why the 4 second blanking?