Hello I recently recieved a a90f CRT 19inch viewsonic monitor http://www.viewsonic.com/support/desktopdisplays/crtmonitors/aseries/a90fplus/index.htm When I plug it in and connect to pc, the yellow power light turns on. When I turn on the pc the yellow light turns to green as normal, but the screen stays black. I have tried it on as low as 800x600 resolution and on 2 different PC's. Video card ATI radeon 128mb 9800 pro. Is this a defective monitor? and is it able to be fixed? Or is is most likely a tube problem, or am I missing something in my ignorance. Any help would be appreciated.