The type and duration of beeps on bootup vary with the type of BIOS you have. Look in your motherboard manual, as they sometimes give you a translation of what the different type of beeps mean.
Or,take a look at this link, in the big yellow box in the middle, the links may help you. But you need to know what type of BIOS you have; you can normally see this on bootup when the screen is black, and the text is white.
I've seen better charts for beeps, but this is the best one I could find right now. Do check your motherboard's manual/website first. Good luck.
There are two quick beeps, and the cdroms light up (not sure about the hard drive)... everything inside appears to be running, but it won't boot