My computer will not display red. I run Windows 98, I have a Dell D1728D-LS 15" monitor (I've tested another monitor, same problem) and a NVidia GEForce2 MX400 graphics card (I've tested another graphics card, same problem). I'm using the default "Plug and Play Monitor" driver, as my best attempts (repeatedly searching multiple websites, including Dell's) have failed to produce a driver for this specific monitor. I've tried turning off hardware acceleration and booting in safe mode, but neither fixed the problem. I've just about arrived at the conclusion that my motherboard is damaged or flawed, and I just want to be sure I haven't missed anything. Any suggestions (short of a new motherboard)?