PC unexpected shutdown

Jul 16, 2018
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Hi, new here.

Just after any possible answers anyone can give me after my pc shut down unexpectedly four months ago (small spark and bang near the PSU mother board) it wouldnt turn on again after that so i just left it thinking it was fried and now four months later it has just started up again fine?

I am clueless as to what happened..since it wouldnt turn on the day after or few days after and now it does.

any help would be sweet!

thanks.