Re: Unable to get any video
Do you have a multihead graphic card or a onboard graphic chip and a graphics card? --> Try connecting your screen to your other graphic outputs. If this doesn't help, try switching to a console with STRG-ALT-F2. Can you see a login now? If not, until which moment in the starting procedure you can see something?
Re: Unable to get any video
To see if it's because of the multiple processors, check this BOOT.INI configuration guide and restrict the number of cores Windows uses to two or one. My guess is it won't make a difference, but that will eliminate that as a possibility.
Re: Unable to get any video
Try to plug in another monitor in to that graphic card or you can also use another pc to check out whether it works or not. Then check out your monitor whether it is working properly or not.