MSI B450 Gaming Pro Carbon AC wont post no debug lights

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  • OsamaObama
    Member
    • Jan 2017
    • 10
    • Israel

    #1

    MSI B450 Gaming Pro Carbon AC wont post no debug lights

    Wondering if anyone could offer any help with this motherboard I have acquired. The board apparently had a BIOS update and then wouldn't POST. I have tried several USB Bios Flashback attempts and also removed the BIOS chip and reprogramed it with a CH314a. Both haven't done changed anything. The board turns on the CPU light turns on then off. CPU gets hot like normal. If RAM or CPU removed then the corresponding light will light up. However the VGA and BOOT lights will never light up.
  • RJARRRPCGP
    Badcaps Legend
    • Jul 2004
    • 6301
    • USA

    #2
    Re: MSI B450 Gaming Pro Carbon AC wont post no debug lights

    The B450-era motherboards seem prone to failure. In my case, what looks like bad MOSFETs.
    Last edited by RJARRRPCGP; 05-19-2023, 07:35 PM.
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    Comment

    • anikin73
      Senior Member
      • Mar 2022
      • 112
      • singapore

      #3
      Re: MSI B450 Gaming Pro Carbon AC wont post no debug lights

      It means the code did not run complete...msi mobo got 4 led, cpu, ram ,vga,and boot.
      I guess your board stuck at cpu led....

      Comment

      • OsamaObama
        Member
        • Jan 2017
        • 10
        • Israel

        #4
        Re: MSI B450 Gaming Pro Carbon AC wont post no debug lights

        Originally posted by anikin73
        It means the code did not run complete...msi mobo got 4 led, cpu, ram ,vga,and boot.
        I guess your board stuck at cpu led....
        It will get stuck at the CPU LED if there is no cpu installed. If a CPU is installed the board behaves as normal with the CPU light on then going off.

        Comment

        • SMDFlea
          Super Moderator
          • Jan 2018
          • 20391
          • UK

          #5
          Re: MSI B450 Gaming Pro Carbon AC wont post no debug lights

          Originally posted by OsamaObama
          It will get stuck at the CPU LED if there is no cpu installed. If a CPU is installed the board behaves as normal with the CPU light on then going off.
          What CPU does it have. Have you read the bios release notes for CPU compatibility

          .
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          Comment

          • OsamaObama
            Member
            • Jan 2017
            • 10
            • Israel

            #6
            Re: MSI B450 Gaming Pro Carbon AC wont post no debug lights

            Originally posted by SMDFlea
            What CPU does it have. Have you read the bios release notes for CPU compatibility

            .
            Ryzen 5 3600 which is known to work. I have attempted flashing the latest bios several times which should support the CPU.

            Comment

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