Startup issue with new psu

I recently got a new psu, Corsair CS650M, but when i try to start it up, the fans spin for a second or two then goes into 4 beeps (Flashing failed (checksum error, corrupted image, etc.)) I don't know whats wrong but I am pretty sure it is the psu or the connection between the psu and motherboard. I have looked all over but I can't find any help. Anyone know whats wrong?
Reply to shagrix
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More about startup issue psu
  1. Have you tried clearing the CMOS.
    Reply to SR-71 Blackbird
  2. SR-71 Blackbird said:
    Have you tried clearing the CMOS.

    just tried, no luck
    Reply to shagrix
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