Why does my computer keep beeping when I turn it on and it never comes up

i turn the copmuter on it beeps continueiously and the monitor doesn't come up like there is power but no connection

If your PC beeps and fails to boot (start up):
On startup, computers perform a Self Test, this is referred to as a POST. If problems are found while booting, the beeping is ment to send out a code to help diagnose the problem. If your monitor is working, the error codes are usually displayed on the screen. However, if the display is not working and nothing displays on the screen, the computer uses sounds (i.e., or codes) to indicate what is probably wrong. Many of these error codes indicate problems with your equipment and you may need a computer technician to fix. There are some errors which can be easily fixed.
The beep codes are programed into your BIOS chip for the particular mother board in your computer. There are also many diferent codes for all of the PC’c on the market. There are many web pages available indicating the codes for each of these PC’s.
Many PC’s use a common BIOS chip and the beep codes for some common brands of BIOS are redily available. Many BIOS chips will have different beep codes even if they appear to be from the same manufacturer. This is because motherboard manufacturers use codes which relate more closely to their own special setups.
I suggest that you go to the web site of the manufacturer of your mother board and obtain an updated list of codes. Or you can go to Google and request the info for your mother board. Hopefully you will not run into a case where the manufactuer is not documenting the information. Good Luck!

Hclarry thanks for the advice it is true im twlelve and allready know how a computer works and how to fix it because I have taught myself you will need to fiddle around with the cables or leave it beeping or turn it off and leave it for an hour or so the computer is trying to make a solution to a problem with in its database. You can call me a geek if you like. but it works and I fixed it myself. if you are clever enough you probally can do it yourself. but if you know nothing about how a computer functions then you will need a geeky guy to come in. I recomend the guys from PC WORLD because they really are good at solving computer problems. I hope this has helped you the main problem is normally in windows XP because they are older and not as up-to-date as the newer versions! Good LUCK

Its seems that your RAM or memory is not properly inserted.
Mostly beeping error is from memory. try removing your RAM then clean the lower part with an eraser.. Then try inserting your RAM again..
To read more about this try looking here : http://www.techyv.com/questions/how-do-i-interpret-computer-beep-codes