BIOS Flash Issues - MSI B850 Gaming Plus

Posted by SwimInsideTheMirror@reddit | buildapc | View on Reddit | 13 comments

I am trying to update the BIOS on my motherboard prior to assembling everything with the bios flash button on the I/O because I will be using a 9800x3d processor. I have tried just about everything, but the bios LED flashes for like 10 secs then remains solid on. Everything I have read it is supposed to flash for 5-10 minutes.

Here is what I did:

  1. Downloaded the latest BIOS version from MSI's website (7E56v1A41)

  2. Rename the file to MSI.ROM

  3. Formatted USB drive using FAT32

  4. Moved MSI.ROM onto usb drive

  5. Connected PSU to motherboard (ATX and CPU power)

  6. Inserted USB into bios flash slot

  7. Turned on PSU switch

  8. Pressed the Bios flash button

I even tried repairing the drive with bootice and changing it from a GPT partition to MBR. Is the board bricked? Am I missing something obvious? I am going to get a new USB drive tomorrow to see if that makes a difference.