I've had this problem since I got my computer last june, but it's only becoming a problem now because I want a dual monitor display. Here are my specs (Problem explained below): > CPU: (Sckt775)Intel(R) Pentium(R) D 930 Dual-Core CPU @ 3.0GHz 800FSB > 2x2MB L2 Cache EM64T > HDD: 250GB SATA-II 3.0Gb/s 8M Cache 7200RPM Hard Drive > MOTHERBOARD: GigaByte GA-8N-SLI nForce4 SLI Chipset LGA775 1066FSB > DDR2/667 SATA Dual PCI-E Mainboard w/GbLAN,USB2.0,&7.1Audio > MEMORY: 2GB (4x512MB) PC4200 DDR2 Dual Channel Memory (Corsair Value Select) > OS: Microsoft(R) Windows(R) XP Professional w/ Service Pack 2 > POWERSUPPLY: STANDARD CASE POWER SUPPLY > VIDEO: ATI Radeon X1600 Pro 16X PCI-E 256MB VIDEO CARD Both monitors are ViewSonic Optiquest Q7 and they both work. Whenever a monitor is plugged in to the blue (normal) monitor port it doesn't display anything however the computer recognizes that it's there. To see a display I have to plug the monitor into an adapter for the white monitor port. If both monitors are plugged in (white and blue ports) only the one with the adapter shows anything. But like I mentioned, the computer knows the other is there. If I set Extend Desktop it does it. I know this because the mouse spends time off the screen as if it were continued and I took a screenshot and it came back how the display should have looked, only I can't see the right half. Thinking it was the video card, I called tech support and they sent me a new one... It does the same thing. I have the newest monitor and video card drivers. I don't know why it's doing this. Any ideas?