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Windows 7: Please Help: Infuriating Problem

29 Apr 2010   #11

Windows 7 32bit

Quote   Quote: Originally Posted by Thorsen View Post
Digital Visual Interface - Wikipedia, the free encyclopedia

Also look here and make sure that your DVI cables are DVI-I - Dual Link
There is a pic in the "Connector" section....your cables should have pins all the way across if they dont then they are DVI-I - Single Link
Oooh you maybe on to something here, the cable I have connected from the upper (Primary) DVI Out on my graphics card to the first monitor is a "DVI-D (Dual Link)" (According to your wiki link). Where the cable I was attempting to connect the lower (Secondary) DVI Out on my graphics card to the second monitor is a "DVI-D (Single Link)"

Could me using a mixture of these two types really be the cause of all of the above? Using my DVI-D Dual Link and a VGA cable gives me dual displays but as mentioned above, they have different resolutions and dont look any good. Would my buying a second DVI-D Dual Link cable to match the one plugged in to my first monitor enable Win7 to recognise it do you think?

I really hope so, i'll admit I was starting to give up hope, you have given me a ray of light here, I so hope this is the answer, if so i'll owe you many many pints of your favourite alcohol based beverage!!

My System SpecsSystem Spec
30 Apr 2010   #12

Windows 7 32bit

I've just bought a second Dual Link DVI-D Cable and sadly it made no difference. I'm still unable to detect the second monitor. So im back at square one, here again is a list of the facts:

  1. 2 Identical Acer V223W LCD Monitors.
  2. 2 Belkin Dual Link DVI-D Cables.
  3. 1 Gainward BLISS 9600GT Golden Sample Graphics Card with two DVI-I Out ports.*
  4. All Drivers (especially Display and Hardware) are up to date and stable.
  5. Windows 7 Ultimate Operating System: Up to date and stable.
  6. Both Monitors have been tested and are working 100%.
  7. Both Cables have been tested and are working 100%.
  8. Windows Display and Nvidea Control Panel both cannot detect 2nd Monitor.
  9. Dual screens can be displayed when a VGA cable is attached via a DVI-VGA Adapter but due to the resolution mismatch this is not practical.
  10. Second display shows "No Signal" on screen when attached to the PC via the DVI cable, but shows "Cable not attached" when the cable is removed from the back of the PC (and leaving it in the back of the monitor).
*The graphics card states that it has "Dual-Link DVI-I" but the two cables im using are Dual-Link DVI-D) would this make a difference? The primary (top) DVI port on the graphics card has one of the DVI-D cables plugged into it and the picture is coming through perfectly on the first monitor.

I'm completely at a loss here, the only think that i can think of is that maybe there is some hardware issue with the secondary DVI Out port on the graphics card, however as I am able to get a VGA signal from it when using an adapter this would lead me to think otherwise.

Please help if your able, I'm totally baffled by this.

Thanks in advance
My System SpecsSystem Spec
30 Apr 2010   #13

Windows 8.1 Pro RTM x64

Have you actually tried the lower port on its own with a DVI connector? Just because it can output VGA doesn't mean to say that it can output DVI if it is faulty.

Here is an illustration showing the pin layout. It's not very clear, but that doesn't matter here.

Please Help: Infuriating Problem-500px-dvi_pinout_svg.png

The VGA outputs are those indicated in PINK, and it is possible that these are working whereas the other DVI outputs aren't.

My System SpecsSystem Spec

30 Apr 2010   #14

Windows 7 32bit

Just tried it and no, nothing. I unplugged the DVI Cable from the top DVI Out on the card and left the bottom one in and got nothing on the monitor.

I did notice something odd though, just out of curiosity I plugged in the VGA cable with the DVI Adapter on the end I need to plug into my Graphics card and again left the top port on the card empty, the screen fired up, so I can confirm that contory to what ive been told, I can run a monitor on the lower DVI Out without something being plugged into the to upper one.

Quick question, if it turns out that the lower DVI port is faulty, am I able to use a Dual-Link DVI-D Splitter (if one exists) in the working DVI Out on the graphics card to run Dual Monitors with Extended Desktop, having a clone of the first screen is of no use to me. Also i would want to be able to run both of these monitors at the same resolution (1680 x 1050 is the recommended resolution for my two monitors)

cheers for your help mate
My System SpecsSystem Spec

 Please Help: Infuriating Problem

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