So I recently went out and bought a second monitor for my computer and everything was working fine until I restarted my computer. I now can not do anything to get them to work, I have tried everything I can find! My main monitor is connected through DVI while my second monitor is connected through HDMI. I have an AMD Radeon HD 6800 Series graphics hardware, an Intel Core i3-2120 CPU @3.30 GHz processor and I'm running Windows 7 64-bit operating system.
Do you try to reinstall video drivers?