I have always associated black screen beeps with some critical hardware not working way before the machine boots into windows and starts looking for stuff you added later.
With me I get a low res message on the monitor along with the beep if its's saying a HD is missing (not a biggie if the OS is on another HD). But I suspect that in your case it can't even get that far into the BIOS so I also suspect a memory problem (bad stick) or something real early in the boot is bad.
How about the fan on the mother board if it doesn't spin up in the initial seconds?