Hi. i built my computer about a year and a half ago, and it's been working fine. last night, though, there was a power outage, and it flicked on and off a few times. eventually, it came back on, and i got back on my pc. it worked fine, and i turned it off before i went to bed like i usually do. so, about 12 hours later, i decided to get back on it and when i hit the power button, nothing happened except the motherboard starting to make one long beep. i looked at the power supply and the light that says it's on and is getting power was just off, or very faint. is this a problem with my power supply? i tried using a different cord, but i can't really figure anything else out. please reply as soon as possible.

edit: http://www.newegg.com/product/produc...82E16813127234 that's my motherboard