I put my graphics card on right and i plug in my monitor in the screen shows up blank whats wrong with it? i need help!

Basic question have you plugged it in?
If not do that!
Otherwise what are your computer specs?

Yeah i have a converter and 2 ports. but yes i pluged it in. i pissed that it doesnt work
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Have you built this machine from scratch?
If so check that you have the power button wired up correctly.
Am i right in thinking that when you press the power button nothing appears on your monitor when the monitor is on? Do you hear any fans 'wuring' or the HDD sound? Does the monitor display a message similar to: "No signal" when you press the power button on your machine?

yes i built it from scratch. i have all the fans running ( inculding the video card one). but when i turn my moniter on it says no signal. thank you for helping me

No signal to the monitor would point to the conenction between the gfx card and the monitor to be bad. Though the monitor has power going to it which is good. Are you going to be having an extended desktop setup? You have 2 gfx cards which would point out that you have 2 monitors? Am i right in thinking this?

no i only have one monitor but i can have 2. my monitor works fine for the computer i have right now.

Can i ask why do you have 2 Graphics cards?
The only need for two is if you are going to link them together or have 2 monitors run off of them. With the two different makes and models that you have joining them to work together is gunna be hard work.

what? I only have one graphics card.

Oh sorry, that's a fault on my part, your Video Card is the Radeon, I saw nVidea and guessed it was another Video Card!