black screen upon startup

Hello,
Here is the problem that I meet with my machine:
upon startup I have three long beeps, two short beeps and then nothing the screen stays black.
Early light of my monitor reports on the green but flashes. I disconnected my screen of my CPU, this light stops flashing and a message telling me my screen that connects not displayed.
ADI ds that I plug the cord of my CPU, the computer starts
immediately unless I press the button ignition. Early light ignition points
green, but I can not stop the machine from the button ignition. When I top
nothing happens, we must unplug the power cable to the CPU to stop the machine

it is already an old PC that you use? because there BIP and the startup is that its already an old saw that on the recent PC it has no beeps ...
Otherwise my advice is that you have a defective piece ;-)
I think you should bring your machine repair

the beep is still boot up on the real motherboard