Z490 MEG UNIFY - CPU LED + "--" MB LED AFTER DRAGON CENTER BIOS UPDATE - W11

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jimmy.sid.j154802d8

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Hello everyone,

Maybe some one would be able to help me before the Support will have answer my ticket.

Since yesterday, after doing the BIOS update, my PC is starting but only show a "--" on the MB LED and the CPU LED is always ON.
Black screen, not able to do anything..
The Update did good, ended without problem and after the end, the PC reboot by himself but don't work anymore..

Can someone help me ?

Thanks.
 
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1) Which UEFI version did you install? 7C71vAB?
2) Have you tried reverting to the previous UEFI version through "Flash BIOS"?

PS I think I'll be repeating a forum's worth of wisdom if I say that updating your UEFI through Windows applications is not recommended.
 
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Yes, if i correctly remember it was the 7c71vAB who get install before it destroy my pc.

You talk, about getting an older BIOS version from the support MSI site, rename it as "MSI.ROM" on a clear USB key and press the BIOS BUTTON behind after put the USB KEY in the good Flash BIOS port ?
I tried this but with the latest version of the BIOS, 7C71vAB.
After pressing the button, he show a fix red light, never start to blink and after releasing the button nothing appear, he instantly turn off the red light.

Thank you for try to help me.
 
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Yes, that's the method I was thinking of.
Two things here:
1) If the most recent BIOS/UEFI version (i.e. 7C71vAB) bricks your board, irrespective of how you load it, then I would try doing Flash BIOS with the last stable version.
2) Many people have reported that they needed to try doing Flash BIOS with a host of different USB sticks before they finally found one which worked.
And, on a side note, you could/should provide the detailed specs of your build - this may be useful for others who want to help troubleshoot your problems.
 
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Hmm I dont have some many USB Stick but I will try my best for find more to test.
I will start to try with the 7c71va9 on some different stick.

I only have two stick actually, and no one of them worked..
EDIT: Tried 4 stick.. 16, 4, 2 and 1Gb... Don't work.

About my specs :

Z490 MEG UNIFY
I7 10700KF
64GB RAM (Corsair Vengeance RGB Pro C16 DDR4 3200 (PC4-25600) C16)
WD Black SN750 SSD NVMe - 500Go
WD Black 3.5 1To - 7200 RPM SATA 6 Go/s 64Mo Cache
NVIDIA 1050 Ti

Windows 11 Pro x64
 
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Try >>Clear CMOS Guide<< with power cord unplugged,
then leave 1 memory stick only in DIMMA2 slot and try again to boot.

If still no change, try again with flash back button, check the instructions:
f4.PNG
 
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Svet said:
Try >>Clear CMOS Guide<< with power cord unplugged,
then leave 1 memory stick only in DIMMA2 slot and try again to boot.

If still no change, try again with flash back button, check the instructions:
View attachment 159806
Click to expand...

Thanks you too for the help you try to provide me.
I did exactly what you send but nothing new happen..

Power cord unplug, the CMOS battery remove, only one RAM connect on slot 2, the 1GB USB Stick, MSI.ROM on the root. I do the clear, jbat1 + clear button in the back panel. Wait 1 minute.

Actually my MB have the CPU and GPU and all other thing connected, but I clearly dont think that if i remove everything for just keep the CPU + ATX PWR1 connected, it wont help me..
At the point I press the Flash Bios Button, the first time nothing happen, I release him, and then when I press again, he start to be RED. when i release after few second, just turn off.

Today, the Client Service just told me that "unfortunatly since I havent buy the MB Card in French there is not point to get help for them" :) :) :)
Just imagine, as a Member of Executive Committee in a big Retail Brand, how I dream to have this guy under my service for fire him as he deserve.

I will wait the Support ticket response too but it seems that MSI sold product who arent stable, who crash from one year and cant assum the responsibility.
Pretty sure, I will never work with this brand since I can see how they are considering the client.
 
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You are a victim of this: !!! Warning: Z490 boards - problem with recent BIOS updates !!!

However, you have the Z490 UNIFY, one of the three MSI Z490 boards with a Flash BIOS Button. So normally it shouldn't be a huge problem. So far, nine people with an affected Z490 ACE/UNIFY/GODLIKE could recover from it using the Flash BIOS Button method.

However, the Flash BIOS Button method is very picky about the USB sticks sometimes. In fact, the old and cheap USB sticks with small capacity seem to work the best for that method, read here.
With the Flash BIOS Button it's like this: It should take around 5 minutes of a certain kind of blinking for the process to complete, then it reboots. If it keeps blinking for longer, or if it doesn't start the certain kind of blinking, or if it stops after a few seconds, then it failed.

You have to simply try with different USB sticks to make it work, don't give up easily. The latest BIOS version will work just fine once it is flashed successfully, it's only something during the flashing that corrupts it sometimes. At least that's the theory. However, we had one other such case where the user couldn't manage to flash his corrupt BIOS on the Z490 UNIFY with this method.

If worst comes to worst, you can do it like him: https://forum-en.msi.com/index.php?...cent-bios-updates.367575/page-27#post-2120787
 
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Exactly, the Z490 has the Flash BIOS button and I was very hopeful that this might work. It still might - provided you find a USB stick that works with your board.
Also, I've read mixed opinions about whether or not to remove everything from the MB before doing the flash. Some say yes, some say it doesn't matter, and I myself have had success both ways. So there you go.
But I can confirm what @citay has just written - the oldest, smallest, most rundown sticks are the best.

PS I may be a dummy, but I never clear CMOS by removing the battery and shorting the pins and pressing the Clear CMOS button (if the MB is so equipped). Either number one, number two or number three.;)
 
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