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 Getting Powered Up

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troooman
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تاريخ التسجيل : 27/01/2009

مُساهمةموضوع: Getting Powered Up   الإثنين 29 نوفمبر 2010, 12:10 am

Getting Powered Up Turning the Computer On...
OK, if you're reading this right now, you've obviously successfully powered up your computer. This page is for the times when something goes wrong. As you probably already know, you use the front power button to switch on the computer. If it does not power up, you should check to see that the rear power supply switch is set to the '1' position. The '0' position is OFF. If the computer still fails to power up, you should check the see that it's plugged into a working outlet and make sure that the power strip's main power switch is in the ON position (if you have a power strip). Most power strips have an indicator lamp to let you know that they're on AND that the strip is plugged into a working outlet. Assuming that your computer is in good working order, it will come on when you push the main power button. When it powers up, the 'power' light will be lit and the hard drive activity light will be flashing/flickering. You will also hear the hard drives 'spin up' and you'll likely hear at least one fan turn on. More On Booting Up:
In general, a computer is nothing more than a processor of ones and zeros. Without some basic instructions, it is essentially useless. When you power up your computer, the information on a small programmable IC is accessed. When this basic code (known as the BIOS -- which I will cover later) is executed, only then can the computer do anything useful. After this basic information is used, the computer then looks for instructions on the hard drive (and/or other drives). When it finds the appropriate information, it then pulls that information from the hard drive and produces what's known as a GUI (Graphical User Interface). Not so long ago (in the early 1980's), there was virtually no graphical interface (other than text), no mouse, no icons. It was very different from today. Computers were little more than number-crunchers. There was essentially no music or video (nothing like what we have today). When you wanted to make a selection, you typically had to enter a number from a list (even up/down arrow selection from a list was almost non-existent). OK, enough of that....
What if You Have No Display?
If you can see that the computer is working to 'boot up' after you press the power button but you have no display, make sure the monitor is on and is plugged into the VGA port on your computer (I'll assume that you checked to see if it was plugged into a working output). If you get a message on the monitor's screen that there is no input signal, it's likely that the VGA cable isn't plugged in well. If the monitor had no power, there would be no display. There are screws on each side of the d-sub connectors. Plug the cable in and tighten the screws. If the screws are to be tightened by fingers alone (no screw slot), push the plug in after you believe that the screws are tight. If you can not turn the screws after pushing the connector in the second time, it's likely that you have properly seated the connector. The next 2 images show the 'no video' error message from 2 different monitors. As you can see, they're essentially the same.
Note:
On some computers there will be 2 or more VGA connectors. It's very common to have 'two' VGA connectors. Many motherboards (the main circuit board that serves as the interface for most of the computer's electronics) have on-board video processors but the on-board video processors (also known as 'integrated video cards' or 'integrated video processors') slow down the rest of the computer. For this reason, the computer may have a second, dedicated video card installed. If you see a second VGA port, it's likely that the second port is the one you need to use. When you have a dedicated video card, the integrated video processor will be disabled.
As you can see on the computer below, there are 2 blue (VGA) connectors on this computer. When the monitor is connected to this computer, it has to be connected to the blue connector on the video card in the expansion slot. You should notice that there are two other connectors on the video card. They are for other video formats. I will cover their function on an upcoming page.






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Getting Powered Up
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