Currently running Windows 7 Profession 64 bit with i5, think I would be able to write better code if I add a 2nd monitor so I grab an old one and hook it up to the 24(+1) DVI port using a DVI to VGA adapter. Unfortunately, it's black, and nothing shows up. They work fine apart, but once put together: Nothing.
The display shows up in the monitor control panel, but the option to change resolution does nothing. Monitor stats below.
13×13 Square ViewSonic VA 705b with an NVIDIA GeForce GT 625 (OEM)
Best Answer
Maybe it sounds stupid, but do you have both monitors connected to the video card, and one not to the motherboard? (It's easier to overlook this than you'd think).
Does the monitor have more input options, if so, it might just be on the wrong channel. Use the source button, or a menu button to cycle through channels until you are on the right one.