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I tried to restart automatically but it failed after about 2 secs. It won't switch on at all now. What part just failed? It's a desktop.

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closed as too broad by Ƭᴇcʜιᴇ007, Karan, Michael Kjörling, mpy, Nifle Jul 19 '13 at 14:40

There are either too many possible answers, or good answers would be too long for this format. Please add details to narrow the answer set or to isolate an issue that can be answered in a few paragraphs.If this question can be reworded to fit the rules in the help center, please edit the question.

What precisely happens now when you try to boot it? How far do you get? – David Schwartz Jul 19 '13 at 0:29
up vote 1 down vote accepted

Could be several things. I had similar problem to this with a Laptop and the Best Buy Geek Squad said it was power issue. The laptop collected dust for a few years then one day I take it appart and I figured I would try tightening the CPU, it worked after that. So it was CPU issue not a power supply issue, but both could be the case. Another thing it could be is cooling. As safety feature computers will sometimes shut themselves down if they are over heating. If your fans aren't running then this to could be the cause.

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