Problem with new build not displaying

My friend and I recently built a pc together, and after starting it up, and everything running perfectly, we came to find out that nothing was being displayed on his monitor.
We have used the monitor before, so we know all inputs work correctly.
We have used the cables before, we know those work correctly.
However, using dvi on his GTX550 graphics card did not display anything, and hooking the display up to the built in dvi slot on the motherboard yielded no results either.

Any suggestions how to get the display to work correctly would be appreciated.
Thank you for any/ all help.
3 answers Last reply
More about problem build displaying
  1. Yes, all of the above.
    Do you by any chance have any more case sensitive suggestions?
  2. Did you update your GPU drivers?
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