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Windows 7: No signal input


14 Mar 2012   #1

Windows professional 64 bit
 
 
No signal input

When I first start my computer I get a message in a small green box "no signal input, check video cable". It sometimes takes 15-20 minutes before I can get into my desk top?


My System SpecsSystem Spec
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16 Mar 2012   #2

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

That message is being generated by your monitor. It is telling you that there is no signal coming from your video card and PC. You would get the same message if you disconnected the video cable.

So what is going on with your video card? That is the question.

The fact that it eventually comes on is curious. That suggests to me that there is a driver error or driver conflict going on and it is taking 20 minutes for Windows to resolve it. But it could be several other things too.

Is there any other information you can give us regarding the behavior. Any error messages? Problem devices in Device Manager? Any other unusual behaviors?

Let us know.
My System SpecsSystem Spec
17 Mar 2012   #3

Windows professional 64 bit
 
 

There are no other symtoms or problems that I know of. I have had the hard drive optimized, defragged, cleaned. Once the monitor comes to life it operates fine
My System SpecsSystem Spec
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18 Mar 2012   #4

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

First, test the monitor on another, know working, computer. Make sure the problem does not follow the monitor.

If the monitor tests fine, then I would recommend trying a clean installation of the video drivers.
  • Go to the ATI or nVidia website and download the most current known good driver and save it to an easy to find location.
  • Now go into Windows Explorer and in the C: drive find the nVidia or Program Files > ATI folder (inside will be Drivers > your driver version) and delete it (the whole folder).
  • Go into Start > Control Panel > Remove a Program and uninstall all programs for the video card. For nVidia, do PhysX and Stereoscopic 3D first, then the driver. The control panel will uninstall with the driver. For ATI, select “ATI Catalyst Install Manager” and click on “Change”, then “Uninstall All Components”.
  • Restart the computer.
  • When it reaches the desktop Windows will find new hardware and will install it's own WDDM1.1 driver. Let it. You will be asked to restart. Do it.
  • Once back on the desktop you can now install the nVidia/ATI driver package for your card.
If reinstalling the drivers does not clear up the symptom then you may have to start thinking about a defective video card.
My System SpecsSystem Spec
Reply

 No signal input




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