BIOS 7C71vA9 killed my motherboard MEG Z490 UNIFY

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John Eisberg

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Hi all! Today I downloaded and updated the BIOS of my MEG Z490 UNIFY motherboard to 7C71vA9. After updating the BIOS and starting my computer, a black screen appeared and the CPU LED on the motherboard came on. Using the USB Flash port to update the BIOS, I updated the BIOS again to version 7C71vA9 and again got a black screen and CPU LED on the motherboard. After that, I flashed version 7C71vA8 and the computer started working.

Be careful!!! BIOS version 7C71vA9 can kill your motherboard MEG Z490 UNIFY.
 

citay

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You are very lucky that you have one of the two Z490 boards (MSI MEG Z490 Unify and the MSI MEG Z490 ACE) that have the Flash BIOS Button. A lot of other people with lesser boards have bricked theirs lately with these dangerous latest BIOS updates. That for some reason are still online. MSI dropped the ball bigtime on this one.
 
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fatedust

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Hi all! Today I downloaded and updated the BIOS of my MEG Z490 UNIFY motherboard to 7C71vA9. After updating the BIOS and starting my computer, a black screen appeared and the CPU LED on the motherboard came on. Using the USB Flash port to update the BIOS, I updated the BIOS again to version 7C71vA9 and again got a black screen and CPU LED on the motherboard. After that, I flashed version 7C71vA8 and the computer started working.

Be careful!!! BIOS version 7C71vA9 can kill your motherboard MEG Z490 UNIFY.
Would you mind to share your CPU and USB disk brand, capacity, and format?
 
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Z490 meg unify, 10600k. a9 just did the same to me. Unfortunately, I can't seem to get it to flash with a USB. I've renamed the file to msi.rom, placed it in the correct port, and pressed the bios button. It illuminates, blinks, then turns the system on to the cpu code error and does nothing else. Wow, frustrated to say the least. Should have come here first...
 

John Eisberg

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Z490 meg unify, 10600k. a9 just did the same to me. Unfortunately, I can't seem to get it to flash with a USB. I've renamed the file to msi.rom, placed it in the correct port, and pressed the bios button. It illuminates, blinks, then turns the system on to the cpu code error and does nothing else. Wow, frustrated to say the least. Should have come here first...
You need to rename msi.rom to MSI.ROM and format USB flash drive in NTFS format to update motherboard BIOS. Refresh of BIOS in FAT32 format of USB flash drive on MEG Z490 UNIFY board does not work! I tried updating the BIOS from FAT32 format on a USB flash drive and it didn't work.
 
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You need to rename msi.rom to MSI.ROM and format USB flash drive in NTFS format to update motherboard BIOS. Refresh of BIOS in FAT32 format of USB flash drive on MEG Z490 UNIFY board does not work! I tried updating the BIOS from FAT32 format on a USB flash drive and it didn't work.
Thx for the reply. I should have been more specific, sorry. File was in caps, and NTFS format on the drive. File also in root...
 

citay

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Often times, the USB stick needs to be formatted in FAT32 for Flash BIOS Button method. Use Rufus to format it (FAT32 non-bootable), it tends to work best.
 

aaronpeigh

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yeah I updated the BIOS couple of days ago and experienced the same thing. So handy to have the flash BIOS button on the motherboard was able to load up the older BIOS and flash away. Once I did that computer is back to normal. I guess the saying goes "If you BIOS is working...don't update it." MSI should remove the BIOS from the website or I wonder if people with 12 gen CPUs are having the same issue. Mine is a 11850k and noticed the CPU light on the motherboard was on. According to the manual it means that the CPU is not detected.
 
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