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Windows 7: Dual Monitor Problem

25 Nov 2010   #1

Windows 7 Ultimate 64 Bit
 
 
Dual Monitor Problem

Ok so I am trying to change my current display so that I have dual screen but I have a problem. When I plug in my second screen it recognizes it is plugged it but wont connect. However if I remove the cable to my main display the computer then changes the display to the 2nd monitor. When I plug my main display back in it then converts back to my main display leaving the second black again.

My main display is connected via HDMI and my new display is a VGA 17" Starlogic LCD monitor the rest of my specs are in the spec box.

Any help would be much appreciated.

My System SpecsSystem Spec
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25 Nov 2010   #2

Microsoft Community Contributor Award Recipient

Windows 8.1 Pro with Media Center
 
 

When both displays are plugged in, what option have you chosen in Screen Resolution settings?

Dual Monitor Problem-dual_display.png

Kari


My System SpecsSystem Spec
25 Nov 2010   #3

Windows 7 Ultimate 64 Bit
 
 

See when I printscreen it comes up, however it wont actually disply on the monitor so the computer is recognizing it just wont display both at the same time.


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Dual Monitor Problem-untitled.png  
My System SpecsSystem Spec
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25 Nov 2010   #4
Microsoft MVP

Win 7 Ultimate x64
 
 

Quote:
My main display is connected via HDMI and my new display is a VGA
That is probably the problem right there. The card may have three connections but there is only two RAMDAC's on it,

RAMDAC - Wikipedia, the free encyclopedia

which only allows for 2 displays at a time. I think you will find that your card (and pretty much any card with 3 connections on it) is that one RAMDAC is for the DVI port and the other is for both the HDMI and VGA port, which would explain why the second monitor starts to work when you disconnect the HDMI port.

Try connecting your primary monitor to the DVI port, with the second to the VGA port and I'd bet both will work no problem
My System SpecsSystem Spec
25 Nov 2010   #5

Windows 7 Ultimate 64 Bit
 
 

Ok I will go shopping tomorrow and hopefully let you now then.
Thanks for all the help.
My System SpecsSystem Spec
25 Nov 2010   #6

Operating System : Windows 7 Home Premium Edition 6.01.7600 SP1 (x64)
 
 

my card i have dvi and vga and the two monitors work perfect also have a look at DisplayFusion Multiple Monitors Made Easy i suggest this to all duel monitor users because of the great software it is and what you can achieve the basic is free but the paid pro version is worth every penny in my opinion your card is nice


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Dual Monitor Problem-display-fusion.png   Dual Monitor Problem-display-fusion2.png   Dual Monitor Problem-display-fusion3.png  
Attached Images
 
My System SpecsSystem Spec
25 Nov 2010   #7

Windows 7 Ultimate 64 bit Steve Ballmer Signature Edition
 
 

Just a thought, what do you see when you use the Windows Key + P keyboard shortcut for Windows 7?

Also, since one display is connected via hdmi, do you have an alternative dvi connection and cable? If so, give that a shot and report your results!
My System SpecsSystem Spec
26 Nov 2010   #8

Windows 7 Ultimate 64 Bit
 
 

Ive tried win+p but nothing still, I havent had a chance to go out yet, as soon as I can ill try it. Also I tried putting the VGA cable on the VGA slot on the motherboard but that didnt work either. I don't know if that would help but?
My System SpecsSystem Spec
26 Nov 2010   #9

Windows 7 Ultimate 64 Bit
 
 

Also thjat DisplayFusion looks really nice I will have to look into that, again thanks for all the help!
My System SpecsSystem Spec
26 Nov 2010   #10

Operating System : Windows 7 Home Premium Edition 6.01.7600 SP1 (x64)
 
 

Try connecting your primary monitor to the DVI port, with the second to the VGA port and I'd bet both will work no problem

did you do this what stormy13 said?
My System SpecsSystem Spec
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