ATI 3870 doesn't recognize 1 monitor, but will recognize other 2

[crazytegger]

Hey guys,

So here's the scoop. I've got an ATI 3870 with 2 monitors. Works perfectly. No issues. I Just got a 3rd monitor, and a second video card (some low quality Nvidia).

Now I want my computer setup like the following:
ATI3870 - New Monitor + 1 old
Nvidia - 1 Old

But my new monitor isn't accepting a signal. It stays in sleep mode when connected to the ATI card. It does NOT say 'no signal'. So it's working in some form or another. Windows 7 x64 display properties doesn't detect the new monitor either.

I can get it to work by swapping the new monitor and old monitor cables so that the new monitor is running off the nvidia card, essentially my old setup.

I've tried swaping cables, taking out the cards, but nothing seems to be working....

Any help would greatly be appreciated.

[deveritt]

In that case you have to check out the setting of your monitor because of which you are facing such kind of issue, it might happen that you had forget to make some small setting because of which you are facing such kind of issue. Have a check and if you face same issue then reply back.

[crazytegger]

no settings on the monitor are changing