Computer wont boot

So, about 1 and a half years ago I built a computer.
Today when I was browsing, not doing anything that would put any serious load on anything my computer just *** down without any BSOD.
When I tried restarting it, nothing happened.
I tried pulling the power cable for a few second and plugging it back in, this caused the fans(cpu, gpu and case) to get about one spin and then everything died again.
When I pressed the power button on my PSU it made a slight electrical popping sound and had a slight burnt smell.

Is it safe to say that the PSU is dead, or might there be other causes?
Just want to make sure before I start ordering new parts.
2 answers Last reply
More about computer wont boot
    did it sound and look like that if so hopefully when your power supply committed suicide it did not take anything out with it.
    your going to need a new ps to start with.
  2. no, nothing as extreme as that, and as said it still makes the fans sort of start when I cycle power.
    when it originally shut off it was like a power outage, no sounds of flashes.
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