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I have had problems occasionally with connecting a second monitor, too. Hook up both monitors. In the Windows control panel, look up display (or right click on your desktop and select display). Is the second monitor shown? If not, click "detect" and see if it shows up. I have had a couple times where I clicked on the monitor icon in "display" and then clicked "enable this monitor" and it started working. If not, then try switching the cords so your working monitor is the second one. try again and see if it show up. If not, the problem is probably with the video card or video card driver. Try and update the driver for your card.https://www.geforce.com/hardware/desktop-gpus/geforce-8800-gt
If this does not work, the issue is probably the card.
Hi Geoffrey,
The Issue is that the Serial Slot at the back of the CPU Tower has gone bad,you need to change the Serial Slot in your CPU and then Check it
This means that a video signal has been detected but it is beyond the range for display. As an example, if the monitor can only display 1024x768 and you send it a signal at 1280x1024, you will get that message. Try to downsize the display settings on your computer system until the monotor works.
first problem could be the hdmi cable you are using is loose or broken.second, the display mode you selected was wrong, try to go to desktop and right click and choose nvdia control panel and choose the nview display mode to use,select the only use one display(single)and apply.
Thank you for providing your configuration details.
You have failed to specify wheather or not your LCD Display is under Warrenty.
Perhaps these simple trouble shooting procedures will get the job done.
1. use the DVI to VGA adaptor that came with your card
Plug in a regular CRT monitor to the Primary Display Output Port using the DVI to VGA adaptor
( either port can be designated as the primary by you )
I like to use the Port nearest to the motherboard as the Primary
2. plug in the your LCD monitor on Secondary Display port using your DVI cable
At this point you should be able to see your desktop on the Primary CRT Display
3. Go to the display properties and use the Nvidia Dual Display Setup Wizard
set both desktops to CLONED at a resolution of 1024x768 and set the refresh to 60Hz
which is default for most LCD displays , some have higher refresh rates , consult your user manuel
If the display resolution and refresh are set incorrectly for your CRT or LCD you will see
Signal Out of Range ( if the display has the ability to display that error message )
At this stage both displays should be showing a Windows Desktop
If you now see your desktop on both displays , you can now put the LCD on the Primary Port
No Signal Detected ( this means the display device is not receiving a signal )
If your LCD display is still displaying the error message
"No Signal Detected" after performing the trouble shooting proceedures
You may need to read the user manuel about how to enable DVI signal input.
If you are certan you have done everything correctly but still see only "No Signal Detected"
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