I've just installed a new graphics card (Radeon 9250; 128mb)so I could play Civilisation IV. Yesterday, while playing the game the monitor switched off (went to sleep) but the game seemed to be still running as I could hear the audio. I couldn't do anything to get the picture back and had to reboot. The power management is set to 'never' go off regarding the monitor ,hard disk etc. Any ideas, please?