Nothing appears on my monitor

[d.y.d]

red
Hi my name is dan and i have just upgraded my computer.
The problem i am having is when i start the computer,nothing comes up on the monitor.
i have changed and swaped graphic cards,harddrives,ram and even motherboards not to mention cables.to no avail.
can someone be so kind as to help me.
i thank you regars dan.

 

[SOcRatEs]

Howdy!

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[Abraxas]

Either you didn't turn on the screen :haha:
or it might be a problem with the PSU on the same power strip as the monitor.
I had that problem once. Whenever I turned on the screen and then tried to boot, not even a beep would be there.
That might happen as soon as you put more or different hardware into the machine and the consumption changes.

 

[Richscd2]

which parts are new?