Whats the complete spec of the computer? Motherboard beeping can be loads of things. Check that the cpu isn't overheating (if possible) and that the voltages 3.3, 5 and 12 are within 10%.This can be found in your bios setup (usually hitting del on boot) Have you added any hardware? What o/s are you using, do you have the latest bios version (available from the m/b vendor). When you boot, do you have a display, or is it black? Does the m/b keep beeping or does it beep 3 times and then stop?
Never trust a man who, when left alone in a room with a tea cosy, doesn't try it on. - Billy Connolly