Hahaha well for one thing its normal for a computer to give a beep or two when starting itself up. That's like the beep of safety its the computers way of letting you know its good to go. BUT lets say one day your computer decides to beep a little differently or maybe even sound like its going to have a heart attack! What do ya do then?
BEEP CODES are the computers way are telling you whats wrong with it! carefully listen to the beeps and you will hear a series of beeps maybe a few long beeps and or short beeps and then it starts its beeping cycle over again...Basically each beep code represents a different problem the computer is having with one of its pieces of hardware.
I remember one day when my computer started beeping 8 short beeps in a row and freaked me out. Come to find out the computer was trying to tell me that my video card had come a little loose and was not in its proper place! So i popped it back in and problem solved...
Now your computer has TONS of hardware in it and the computer also has a beep code for most of those hardware pieces should something be wrong with it. I could tell you what the different beeps represent specifically however it really depends on the type of BIOS you have. A BIOS is like a mini "operating system" which you can access before windows launches for example. There are many different BIOS manufacturers and each one has built into the computer a different set of beep codes.
My advice to you is to find out what manufacturer and version your BIOS is and then type that into the Internet along with the words "beep code" and see what comes up. Finding out your BIOS brand is easy...You should see it the moment you first turn the power onto your computer. It might say "award bios" for example or IBM or phoenix etc. Should you nothing come up on your screen at all then what I suggest you do is to shut down your computer, touch the metal case(tower) of your computer for a moment and then unplug it from the wall... Then open up your tower(case) and look inside on the biggest circuit board you can find this is called the "mother board" and everything is basically plugged into it. Look around on there and try to find a manufacturer name. Once you got that type into the Internet "manufacturer name motherboard bios".
In closing your computer will usually give you a friendly beep or two on start up and anything more than that means its telling you something is wrong!