Like PC eye 'almost'said (couldnt resist saying thet, sorry

) Beeps indicate an error the motherboard has found.
the minimum you can run a pc with is, CPU, Motherboard, RAM (at least i stick), and grafic's card.
with those thing's installed and connected (correctly) to the Power supply,.. it should go past the POST, and indicate it didnt find a boot-device ( Big suprise.. Harddisk not connected yet

) but, if it doesnt do anything with only CPU, Motherboard, RAM and Video card,. something is broken.