First Pull cmos cell from motherbord for 10 minutes because sometimes low voltage of cmos cell creates this problem .
After remove cmos cell from motherbord for sometime your bios settings goes to defaults.
Then check.
Also check that smps is work fine .
It is square box on back side of cpu .
Reattch ATX power connector from smps to motherbord.
Also make sure that motherbord surface not touch the cabinet.Check motherbord in outside of cpu .
Let me know if you need more assistanse.
Thanks.
Motherboard is out. I have had the same trouble.
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