so i just bought a new graphics card, the GeForce 8400 GS. The goal was to run 2 monitors on it, and that worked fine.
I then installed a program CALLED actual multiple monitors to extend the taskbar to both monitors, which also worked fine.
However when i turned my computer off last night, i was not able to get a signal from either of the monitors. If i hook one monitor into the standard motherboard slot, it will function (albeit with weird settings; my taskbar is vertically aligned on the left).
I do not think its an issue with the power supply, as my computer isnt THAT old (~2008), and this graphics card isnt high end at all; as well it didnt come with/wasnt supposed to require a power supply, its only 300 watts.
I also believe i have all the correct drivers installed, as i PUT them on straight from the disk, and seeing as AMM was functioning correctly at one point, im not really sure what could be causing it.
Input much appreciated!I would try removing all power to the PC and remove and re-seat the vid card...
These were the factory drivers that shipped with the card...correct ? ?ok ill give that a try. yup they are factory + their own update (the installation disc prompted for it)

EDIT: that did it i guess. i vacuumed out the whole tower to be safe. It appears to be working now.. ill post up again if i get the same issue when i shut down tonight. thanksFor future reference i wouldn't use a vacuum inside a PC case...
They generate huge amounts of static electricity...enough to take out pricey components in the process.Glad you got it fixed.

As Patio said, don't use a vacuum as they do generate a lot of static. Instead, get a can of compressed air and BLOW it out. You can find cans of it most places that have a good selection of computer accessories or order it online. It's relatively cheap and much safer than using a vacuum.