I have an Emachine running Windows 7 Pro. I have (or had) a geforce 210 video card installed so I could run dual monitors. Everything ran well until about 3 weeks ago. The 2nd monitor would not come on after the computer went to sleep. I'd have to reboot the system or disable, then re-enable the graphic card for the monitor to come back on. I tried driver updates but it didn't help. This went on for a couple of weeks but progressively got worse ie the monitor wouldn't come on even on reboot or I'd have to disable/re-enable the graphic card a couple of times before it would come on. Then the 2nd monitor quit-it wouldn't come on at all.
I changed the monitor out thinking it was the monitor. Things seemed OK for a day or so and then the same symptoms. I unplugged the power to the 2nd monitor as when it was on it was flickering-I did leave it plugged to the video card, which may have been a grave mistake.
I changed the video card today. I plugged in the power to the 2nd monitor-and it won't display at all. I tried plugging it into another computer and now this 2nd monitor seems dead too-nothing happens when plugged in to another computer. Do you think something on my mother board could be doing this? It definitely seemed hot when I swapped out the video cards.
So what would fry these monitors to the point of no display at all? I don't think my second video card had a chance to do the damage. Is it time to get a new computer? This one is 2010 or 2011 vintage and heavily used.
Anything I can do to further troubleshoot?