Take themotherbd and PSu out of the case and see if this still happens. If not then you may have a motherbd standoff in the wrong place that is shorting out the motherbd or possbly have not installed the standoffs at all (yes, this has happened )
Take themotherbd and PSu out of the case and see if this still happens. If not then you may have a motherbd standoff in the wrong place that is shorting out the motherbd or possbly have not installed the standoffs at all (yes, this has happened )