Power cuts out almost immediately after pressing power button
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The situation in the link below, is virtually the same except, I never removed the PSU so, I know it isn't upside down. Also, Prior to the present situation, the PSU was never a problem.
I have tried two different power cords, two wall outlets, and one outlet on the surge protector.
Semi-consistently, I get no power or, when I turn on the computer, it shuts down almost immediately.