I'm having an odd issue with my monitors. I installed Windows 7 x64 in December, and both monitors worked fine. But a few weeks ago, I replaced just about every component inside my machine. Now, after reinstalled Windows 7 again, my primary display still works fine, but my secondary display gets no signal. I was previously running an NVidia GeForce 8500 card (ancient, I know), and the new card's an ATI Radeon HD 5770.
The card has two DVI ports and a display port. My 22" LG monitor (primary display) is plugged into the first DVI port, and my old 20" ViewSonic is plugged into the second DVI port via a VGA to DVI adapter.
I have the most up-to-date versions of drivers for both monitors, my graphics card, as well as my motherboard.