On 22 February, 2006, at 11:58:18, JWarren371 at aol.com wrote: > Upgraded my 867 MHz Quicksilver (1.5 GB ram) with a Powerlogix 1.8 > GHz dual processor. Then added an ATI Radeon 9600 Pro 4x/8x AGP 256 > MB Dual DVI Video Card and a 20-inch Apple Cinema Display monitor. > All worked fine for about a week. Then the Cinema Display stopped > lighting up. Tried using an old CRT with the 9600 Pro (using an > DVI-to-VGA adapter)--no joy. ATI gave me a new 9600 Pro card-- > still no joy. Did you try those monitors on any other machine to verify that the problem was with them and not with your CPU?