I run two monitors and have for some time. My second screen is now black. the power light is green. The monitor works--but not when I run two monitors.
I have a nividia GEforce gt220 video card. Both monitors plug into this card. the card also has a HDMI port. I have a hdmi cable running to my TV. (not plugged in all the time. I beleive the card only supports two monitors at a time--not three)
I unplugged the hdmi cable and re-plugged the monitor back in and the monitor is black.
I updated drivers--did a recovery for a previuos date, of course rebooted the computer--and it is still black. From the control panel it says it is working.
Any ideas?