!!! Warning: Z490 boards - problem with recent BIOS updates !!!

kibednar156902dd

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Sep 14, 2022
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Hey I probably managed to find a solution and indirectly the cause of the problem. My motherboard is: MSI Z490-A PRO. Probable fix below, however first I will share my story:

It all started more than a year ago I must point out that I did not update the BIOS ( ewenual automatic windows updates may have d this). I didn't use my computer for some time(about 2 weeks). When I wanted to turn it on there was a problem like on the forum:, fans were running, CPU led was on constantly, black screen. I sent the motherboard back for warranty - to no avail(according to MSI the board works normally). The board in the service was not updated. By chance I found out that my friend has the same MOBO and had the same problem, he solved it in such a way that after multiple reboots he managed to update the BIOS. So I did the same, for more than an hour I constantly rebooted the computer by the way taking out the ram, removing the battery, etc., finally the computer surprised, I installed the bios update (build date 06/29/2021) and from then on there was no problem until yesterday.
I went on a long vacation and upon my return I had the same problem again, but this time reboots didn't help/ This time the LEDs from CPU and RAM ( 1 and 2 ) lit up alternately. I restarted the bios for hours, in different configurations ( restart CMOS, change RAM, etc. ) it had no effect. I doubted , that it can be fixed however I accidentally managed to solve the problem .... Now instructions on how I think you can fix this problem:

1. remove the battery from the MOBO and do not insert it at all.
2. insert one RAM into the 3rd slot ( this is important!).
3. reboot the computer, it should turn itself on. then turn it off and put the battery back in the MOBO
4. once it starts up then install the MOBO update from the flash drive( in my case: build date 06/09/2022)
5) Insert the ram into the correct slots ( in my case 2 and 4) and see if it works
6. if the computer still does not boot on 2 RAMS, then put one of them in the 3rd slot again and reinstall the BIOS (without removing the battery from the MOBO).

In my case after step 5 I observed that the computer doesn't boot and only the CPU led is lit( like most on the forum after the failed update), but reinstalling the bios again (step 6) made the computer work normally and it already boots with 2 RAMs.
Generally these steps should help, in my opinion there is some problem with the RAM controller. After that when I accidentally booted the computer (doing steps 1 and 2) I continued to have trouble getting it to boot normally with the ram in its correct position ( in my case slot 2 and 4) . ).Below are some of my notes that I wrote down trying to solve the problem :
Ram in slot 3, Mobo without battery - works
Ram in 3 slot, battery in MOBO - works
Ram in 2 slot - started up but after some time ( more than a minute)
Ram in the 4th slot does not work
Ram again in 2 slot and does not work (WTF?)
RAM in the 3rd slot does not work.
As you can see, the computer worked very randomly. Only after reinstalling BIOS twice the computer works as it should, it turns on normally every time.
If my solution does not help then try putting RAM in another slot. ( According to me it will boot with only one RAM bone).

Write if this solution helped.

@msi maybe some gift for many hours of trial and error?
 

Doc_Bucket

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Joined
May 12, 2022
Messages
53
Hey I probably managed to find a solution and indirectly the cause of the problem. My motherboard is: MSI Z490-A PRO. Probable fix below, however first I will share my story:

It all started more than a year ago I must point out that I did not update the BIOS ( ewenual automatic windows updates may have d this). I didn't use my computer for some time(about 2 weeks). When I wanted to turn it on there was a problem like on the forum:, fans were running, CPU led was on constantly, black screen. I sent the motherboard back for warranty - to no avail(according to MSI the board works normally). The board in the service was not updated. By chance I found out that my friend has the same MOBO and had the same problem, he solved it in such a way that after multiple reboots he managed to update the BIOS. So I did the same, for more than an hour I constantly rebooted the computer by the way taking out the ram, removing the battery, etc., finally the computer surprised, I installed the bios update (build date 06/29/2021) and from then on there was no problem until yesterday.
I went on a long vacation and upon my return I had the same problem again, but this time reboots didn't help/ This time the LEDs from CPU and RAM ( 1 and 2 ) lit up alternately. I restarted the bios for hours, in different configurations ( restart CMOS, change RAM, etc. ) it had no effect. I doubted , that it can be fixed however I accidentally managed to solve the problem .... Now instructions on how I think you can fix this problem:

1. remove the battery from the MOBO and do not insert it at all.
2. insert one RAM into the 3rd slot ( this is important!).
3. reboot the computer, it should turn itself on. then turn it off and put the battery back in the MOBO
4. once it starts up then install the MOBO update from the flash drive( in my case: build date 06/09/2022)
5) Insert the ram into the correct slots ( in my case 2 and 4) and see if it works
6. if the computer still does not boot on 2 RAMS, then put one of them in the 3rd slot again and reinstall the BIOS (without removing the battery from the MOBO).

In my case after step 5 I observed that the computer doesn't boot and only the CPU led is lit( like most on the forum after the failed update), but reinstalling the bios again (step 6) made the computer work normally and it already boots with 2 RAMs.
Generally these steps should help, in my opinion there is some problem with the RAM controller. After that when I accidentally booted the computer (doing steps 1 and 2) I continued to have trouble getting it to boot normally with the ram in its correct position ( in my case slot 2 and 4) . ).Below are some of my notes that I wrote down trying to solve the problem :
Ram in slot 3, Mobo without battery - works
Ram in 3 slot, battery in MOBO - works
Ram in 2 slot - started up but after some time ( more than a minute)
Ram in the 4th slot does not work
Ram again in 2 slot and does not work (WTF?)
RAM in the 3rd slot does not work.
As you can see, the computer worked very randomly. Only after reinstalling BIOS twice the computer works as it should, it turns on normally every time.
If my solution does not help then try putting RAM in another slot. ( According to me it will boot with only one RAM bone).

Write if this solution helped.

@msi maybe some gift for many hours of trial and error?
Thank you for the detailed procedure.
I am a few days away from finishing my build on a Z490 platform, I have an 8 GB USB 2.0 ready… and I've been reading about the drama since May. :D

If there are more confirmations this works, I'll probably try my luck.
 

citay

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That's some wild way to solve your problem. Nice. But i'm not yet convinced that it was the same problem that we discuss here. Because this problem here in the thread only happens directly after attempting to flash the BIOS, and i've not yet seen Microsoft push an MSI BIOS update via Windows Update. I have seen that done for notebooks before, but not for an MSI desktop board.
Of course, if someone had such a failed update on his MSI Z490, it's easy enough to try if this can solve it.
 

a.watkins13157302e0

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Sep 15, 2022
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Date of failed flashing: 15/09/2022
Affected board model: MSI Z490 Gaming Edge WiFi
CPU: i7-11700k
Flashing method used: M-FLASH via USB
Attempted update to BIOS version: 7C79v16 -> 7C79v1C
Result: Stuck at EZ Debug LED "CPU" after update.

Just ran into this on my MB so it's clearly still an issue.
 

irdgh152702d3

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Sep 15, 2022
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Date of failed flashing: 15/09/2022
Affected board model: MSI Z490 Gaming Edge WiFi
CPU: i7-11700k
Flashing method used: M-FLASH via USB
Attempted update to BIOS version: 7C79v16 -> 7C79v1C
Result: Stuck at EZ Debug LED "CPU" after update.

Just ran into this on my MB so it's clearly still an issue.
Your MB came with the "v16" version from the factory or did you update when it arrived?
 

a.watkins13157302e0

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Your MB came with the "v16" version from the factory or did you update when it arrived?
I think it came with v12, I updated to v16 for the 11th gen support when I upgraded from an i3-10100 to an i7-11700k after the 11th gen CPUs came out (so well over a year ago) but I might not be remembering the version it came with correctly.
 

a.pun14ed02c4

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May 21, 2022
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PCIe 4.0 Loss with newest update 7C77v1C ?
I can't run my GPU and Nvme at PCIe 4.0 Speed anymore since I updated to the newest Bios...
Does anybone noticed the same problem?

Board: MSI Z490i Unidy
CPU: 11700F
 
Last edited:

eneshokelek

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Z490 Tomahawk user here. Still using 7C80v17 2021-02-04 Is it safe to switch to 7C80v1C - 2022-06-21?
10700K
Team T-Force (2x8GB) 3200 Mhz DDR4 Ram I want to try win11 and need to update bios.
Is there anyone who can use the latest bios?
 

sthbtes157c02e2

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May 26, 2022
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Like everyone else, my PC stuck at CPU LED everytime i boot it up. I can solve it by resitting everything, CPU, RAM and graphic card. I think resitting only the CPU will work too but in my case, my Noctua NH-D15 forced me to remove everything before I am able to access the CPU. Hope this helps.

Mobo: Z490m gaming edge wifi
CPU: 10850k
Bios version: 7C76v2D (2022-06-16)
 

citay

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Like everyone else, my PC stuck at CPU LED everytime i boot it up.
The important question though: Did it first happen right after a BIOS update? Because don't think that every occurance of "CPU LED" on Z490 has to do with the problem from here in the thread.
There are a number of different reasons for getting a CPU LED, most of them have nothing to do with this problem.
 

sthbtes157c02e2

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The important question though: Did it first happen right after a BIOS update? Because don't think that every occurance of "CPU LED" on Z490 has to do with the problem from here in the thread.
There are a number of different reasons for getting a CPU LED, most of them have nothing to do with this problem.
Yes, it happened right after BIOS update
 

citay

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Did you check for bent pins in the socket? Because i'm sure people tried to reseat all their components before and it didn't fix this problem for them, because their BIOS was actually corrupted.
As i said before, i'm a bit sceptical about just reseating stuff (RAM, CPU, cards) and somehow making it all work again, when the problem is a corrupted BIOS. Logically it doesn't make that much sense.
But of course i urge everyone to try such things and report if it can fix it for them. It would be nice to have some solution other than programming the BIOS chip again.
 

Doc_Bucket

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Z490 Tomahawk user here. Still using 7C80v17 2021-02-04 Is it safe to switch to 7C80v1C - 2022-06-21?
10700K
Team T-Force (2x8GB) 3200 Mhz DDR4 Ram I want to try win11 and need to update bios.
Is there anyone who can use the latest bios?
My Tomahawk, as I've just learned, came with v18 from the factory (I was quite lucky I have to admit), i.e. the first deadly update, but not the one for Win11.
HOWEVER: I only needed to enable TPM as well as another setting in the menu above it to be ready for Win 11. I haven't installed them yet so I cannot confirm the result but Updater says the PC is ready.
 

eneshokelek

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My Tomahawk, as I've just learned, came with v18 from the factory (I was quite lucky I have to admit), i.e. the first deadly update, but not the one for Win11.
HOWEVER: I only needed to enable TPM as well as another setting in the menu above it to be ready for Win 11. I haven't installed them yet so I cannot confirm the result but Updater says the PC is ready.
Thanks for the heads up. I checked it and turned on TPM now Updater says the PC is ready.
 

tomfanti0157d02df

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Oct 1, 2022
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Date of failed flashing: 23/09/22
Affected board model: z490 gaming carbon wifi
CPU: i7-10700K
Flashing method used: dragon center
Attempted update to BIOS version: 7C73v17 or 7C73v18 (i don't remember) to 7C73v1C
Result: Stuck at EZ Debug LED "CPU" after update.
i opened a ticket with MSI and, after suggesting me to clear cmos, an action i have already try, they say the only solution is to ask for assistence/RMA, but they didn't do it directly in my country. so i just asked the reseller for rma and i'm now waiting to know if it will do it. i bought the mb about a year and half ago, so i'm not sure it will accept. i report my case for entry in the statistic, maybe it will help.
 

omarsow83154202cf

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Oct 31, 2021
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Date of failed flashing: 30.10.2021
Affected board model: MSI Z490 GAMING EDGE WIFI
CPU: i9-10900K
Flashing method used: M-Flash
Attempted update to BIOS version: V18 from V17
Result: Stuck at EZ Debug LED "CPU" after update.

I tried update just for windows 11 compatible and i got this gift .
I live in africa so i can't use RMA , Thanks MSI :-)
Hi all , i posted here the 10-30-2021 because brick of my motherboard after attempt to update to version V18 from v17 version .
Now I just received the CH341A and flashed my motherboard Z490 gaming edge wifi to the last bios version 7C79v1C and all work fine again .
 
Last edited:

omarsow83154202cf

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Oct 31, 2021
Messages
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Hi all , i posted here the 10-30-2021 because brick of my motherboard after attempt to update to version V17 .
Now I just received the CH341A and flashed my motherboard Z490 gaming edge wifi to the last bios version 7C79v1C and all work fine again .
 
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