So I finished building my dad's computer, powered it up. Everything booted up inside(fans spun up, etc). There was this "ticking" sound, so I unplugged all the drives. STILL TICKS. So, I sent back the supply and the mobo, because the mobo did come all beat up and shit...got it back yesterday. Brand new stuff, STILL TICKS! I think it's the power supply, ideas? Help.