Second monitor will not work

[ChopperNoOnions]

After several months of successfully using a dual monitor setup, my newer one(Asus LCD VE228H) started having white lines across the bottom of the screen. In the past they would go away after a while but I tried unplugging and re-plugging in the DVI cords. When I restarted the computer, the display only showed up on my older monitor. The computer did not detect the second one at all. I have tested this on another computer and the second monitor works completely fine. THe only way to get my computer to display it at all is to boot it with the old monitor then switch out the DVI for the second one. The computer only sees it as an unknown device. I have tried finding drivers for this monitor and cannot. any help would be appreciated.

 

[Warrior of Cats]

If you use an AMD graphics card, maybe look at Catalyst settings? If you have a Nvidia card, maybe check Nvidia Control Panel? I have Catalyst, and there are some monitor settings in there.

 

[tsnor]

Maybe post system specs, especially video card (or MB/cpu for integrated video)

Maybe try using a VGA cable or HDMI cable instead of DVI and see if things improve.

"The computer only sees it as an unknown device." On older windows versions going into device manager and deleting the "unknown device" from displays would get windows to re-detect the monitor and use the correct settings. I have not seen that needed with Win7, but it might be worthwhile checking device manager to see if anything was odd looking. Also, windows detects a monitor via EDID/DisplayID data read from the monitor. A bad cable/connection could cause this to be misread. The same bad cable/connection could maybe cause the white lines.