I just built a new system. The motherboard died, so I got a new one. Then the power supply died and I got a new one. I knew the power supply died because it was previously working and then none of the lights were turning on. I assumed I must've of killed it with static while replacing cables. I then bought a new one, which worked. I cable managed, not unplugging one thing. I then sprayed it with air. It now doesn't have any lights coming on or anything. Is it something I did? Do I buy a new power supply?