Mac Mini (mid 2007) Turned Off, Then Odd Ticking?

Today my mac mini just turned off abruptly, like there had been a power out; then there was a kind of spark noise coming from either the power brick or the power point pins themselves. of course I did not have time to inspect because I didn't want anything to catch on fire. I then plugged it back in, and the Mac Mini wouldn't start. I tried multiple power points but it still wouldn't work. Is the power brick dead? is it something with the computer? Would be great to know because I am in the middle of a really big assessment peace at school and I need my Mac. Thanksss