My CX7 with 7900GTX graphics (11 months old) just developed a problem. When I started it this morning the screen had various dotted vertical lines as it went through the boot-up screens. When it finally finished booting, the screen was completely black (off). All of the things I've tried make no difference. 
The only clue I had beforehand was that yesterday on two occasions it did weird things with the screensaver which is just a windows picture slideshow. I have a secondary monitor hooked up, so it displays every other picture on alternating screens. When I came in and turned off the screensaver (hit the spacebar) the screens had weird vertical dotted lines in different places. I just drug a windows box around like a chalkboard eraser on both screens and the display went back to normal.
Now this morning I can't get the display to work. I've done a few searches but haven't found any references to this type of problem. Any ideas?
The only clue I had beforehand was that yesterday on two occasions it did weird things with the screensaver which is just a windows picture slideshow. I have a secondary monitor hooked up, so it displays every other picture on alternating screens. When I came in and turned off the screensaver (hit the spacebar) the screens had weird vertical dotted lines in different places. I just drug a windows box around like a chalkboard eraser on both screens and the display went back to normal.
Now this morning I can't get the display to work. I've done a few searches but haven't found any references to this type of problem. Any ideas?
