|when i open open my central processing unit!|
Where do people get the terminology from.
You mean when you switch on your computer you get nothing on the monitor. The first thing to check is the cable. Try the monitor in another computer to eliminate that as the problem. The start looking at the graphics card. Take the lid off and make sure it is seats correctly.
when you switch on do you get any bleeps form the computer, if so how many.
BTW: Your Central Processing Unit is the main chip on the Motherboard, the big one with a fan on it. It is usually made by Intel or AMD. If you ever did manage to open it it would never work again.