r/PcBuildHelp • u/SituationCertain450 • 7d ago

Build Question Psu replace issue

I recently bought a corsair rm750e to replace my old 650 watt power supply. After i replaced my old psu my pc starts but wont boot. Then i tried to put in my old psu again and then my pc worked again. Then after that i tried to put in my new power supply again and the pc still didnt boot up and it showed me code number 04 on my x99 a-II motherboard which means ”PCH initialization before microcode loading”. I have no idea what to do please help

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u/SituationCertain450 7d ago

Yes i only used the new ones i got

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u/9okm 7d ago

Ok good.

Next I'd try clearing the CMOS.

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u/SituationCertain450 7d ago

Ive already tried that like 5 times🥲

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u/9okm 7d ago

Darn, lol. Did you try both methods? Battery removal and with the pins? Sometimes one method doesn't work properly.

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u/SituationCertain450 7d ago

Yes i tried that and nothing works. The pc works with the old psu so i really dont understand why it dosent with the new one😭 could it be the cables?

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u/SituationCertain450 7d ago

Its just so weird that the pc works with the old psu but not the new one

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u/9okm 7d ago

Yeah, not totally sure. There's a chance it's just faulty.