i just bought this system for 15 bucks from a local pawn shop sorta...anyway, it had no hard drive... i put one in and tried to turn it on...all that happend was the front light went on, nothing else. power didnt even go to the hard drive, and the power supply was makin a low noise....and then i tried another power supply, same thing happend...but this time it didnt make a noise...so i tried ANOTHER power supply and the same thing happend...im not sure wats wrong, i dont kno if the motherboard is fried, but i think one of the capacitors is blown, cuz the top of it isnt flat, the top looks round and bloated, can someone help me out?