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

mel.norri127702aa

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Please only post in English here, but yes, that is most likely the BIOS chip. If you can tell me what's written on there, i can double-check.
On my Z490 Tomahawk the chip shown is a Macronix MX25L25673G. This is a 3V Quad I/O Flash Memory chip that is likely the BIOS.
 
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msi_forum_154b02dc

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Further to my earlier post.
https://forum-en.msi.com/index.php?...with-recent-bios-updates.367575/#post-2082468
My experience of MSI support continues to be extremely poor.

My BIOS update failed on 03-Oct-21. I opened an MSI account and raised a web ticket.
MSI's response was that I should remove and reset the CPU. This seemed strange as there was no CPU fault before the BIOS update. However, I did this and of course it made no difference. I reported this back to MSI who did not respond. I contacted MSI again and referred to this thread. The response I got was that MSI closed my ticket without answering the questions and passed the case on to support. Support emailed me and said send the motherboard back to the company I purchased it from. Unfortunately MSI do not allow you to RMA motherboardboards directly to them in the UK. I did this and it has now been with the supplier for 14 days. I asked the supplier for an update today and they said they are still waiting for an RMA from MSI.

I have been without a working motherboard for 18 days and MSI have not directly acknowledged there is an issue or authorised an RMA to fix my motherboard.
I have no date when this will be done and the motherboard returned to me.

MSI has now pulled the most recent Windows 11 BIOS updates but from this thread it is clear that the issue predates the Windows 11 BIOS updates.
It seems that MSI do not yet really understand the issue. They are not directly acknowledging it and my experience is that are doing nothing to help those of us who have been affected by it in the UK.
 
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on my z490 gaming carbon wifi the bios chip is "winbond 25X20CLNIG"
Using ch341a and AsProgeammer it did not detect automatically, I searched and found "winbond 25X20CL" but every time I try to right on the chip using MSI BIOS I get this error "Fiels Size Is larger Than IC"
need help please.
 

citay

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but every time I try to right on the chip using MSI BIOS I get this error "Fiels Size Is larger Than IC"
The BIOS update file might contain extra information at the beginning (like metadata) for the M-FLASH updater, which is not needed when you flash directly with a programmer. You might have to delete the extra data with a hex editor. They describe it here: https://maylohack.ru/en/est-sovetik...cessor-kak-vosstanovit-bios-kompyutera-i.html

I haven't programmed a BIOS with a CH341a programmer before, so i don't know for sure if you have to do that for MSI updates, but since the board already doesn't boot, you can't make it any worse.
 

TuXEKR156d02de

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Please only post in English here, but yes, that is most likely the BIOS chip. If you can tell me what's written on there, i can double-check.
Sorry, it was automatically translated for me.
If I know what the BIOS is, I just want to confirm if all the motherboards have the same model or others (I had to flash with a programmer and luckily it is working correctly)
 

citay

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If I know what the BIOS is, I just want to confirm if all the motherboards have the same model or others (I had to flash with a programmer and luckily it is working correctly)
Ah, so you wanted to know what kind of BIOS chip was on other people's board, because you successfully flashed a certain BIOS chip on your Z490 Tomahawk with your external programmer?
 
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The BIOS update file might contain extra information at the beginning (like metadata) for the M-FLASH updater, which is not needed when you flash directly with a programmer. You might have to delete the extra data with a hex editor. They describe it here: https://maylohack.ru/en/est-sovetik...cessor-kak-vosstanovit-bios-kompyutera-i.html

I haven't programmed a BIOS with a CH341a programmer before, so i don't know for sure if you have to do that for MSI updates, but since the board already doesn't boot, you can't make it any worse.
The problem is the BIOS that was on the chip is corrupted and when I try to read it it shows FF FF FF everywhere so I can not use it to know where to cut the BIOS from MSI.
Also the ship size is 2Mbit which is equal to 256kb and MSI Bios is 32mb, there is something wrong but I can not tell if it is the ch341a programmer not reading correctly or I am doing something wrong.
If anyone was able to flash Z490 Carbon WIFI chip ID = " Winbond 25X20CLNIG" using ch341a please provide me with the steps and files used.
Thank you

BTW, MSI issued RMA for my motherboard but I checked with the shipping company and it will cost me 340 USD to ship to and from MSI, :cry:
 

TheRenesa

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The problem is the BIOS that was on the chip is corrupted and when I try to read it it shows FF FF FF everywhere so I can not use it to know where to cut the BIOS from MSI.
Also the ship size is 2Mbit which is equal to 256kb and MSI Bios is 32mb, there is something wrong but I can not tell if it is the ch341a programmer not reading correctly or I am doing something wrong.
If anyone was able to flash Z490 Carbon WIFI chip ID = " Winbond 25X20CLNIG" using ch341a please provide me with the steps and files used.
Thank you

BTW, MSI issued RMA for my motherboard but I checked with the shipping company and it will cost me 340 USD to ship to and from MSI, :cry:
Holy cow 340 USD?!
I only paid to ship to MSI. It cost me ~18USD, and I was already pissed. Not sure if it's just me new to RMAs but I was expecting them to cover both ways.
 

stro152c02d9

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The problem is the BIOS that was on the chip is corrupted and when I try to read it it shows FF FF FF everywhere so I can not use it to know where to cut the BIOS from MSI.
Also the ship size is 2Mbit which is equal to 256kb and MSI Bios is 32mb, there is something wrong but I can not tell if it is the ch341a programmer not reading correctly or I am doing something wrong.
If anyone was able to flash Z490 Carbon WIFI chip ID = " Winbond 25X20CLNIG" using ch341a please provide me with the steps and files used.
Thank you

BTW, MSI issued RMA for my motherboard but I checked with the shipping company and it will cost me 340 USD to ship to and from MSI, :cry:
In that case it would be best to use an original backup

I recommend you look at vinafix and buy a bios backup
 
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Holy cow 340 USD?!
I only paid to ship to MSI. It cost me ~18USD, and I was already pissed. Not sure if it's just me new to RMAs but I was expecting them to cover both ways.
You are lucky, now trying to fix it using ch341a if i can't i will have to buy a new motherboard
 

citay

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Holy cow 340 USD?!
Well, he's from Saudi Arabia and the RMA would be with MSI USA, since he ordered it from Newegg. It's good of them to even offer it, but financially absurd, as the board costs less than the shipping.


in vinafix the file size is also 32mb i need a 256kb file but still not sure if ch341a programmer reading the chip correctly
No motherboard BIOS is 256 KB nowadays. You could't fit anything in there. It's 256 Mbit, which is 32 MB. This is pretty much the universal BIOS chip size now.

I think the early 400-series AMD boards were the last ones to use 16 MB BIOS chips. Since the AM4 socket supports a lot of different CPUs, and each CPU generation on AMD needs about 2-3 MB of its own AGESA/microcode for support, they ran into serious size constraints in the BIOS:



That's why they have had to remove support for the oldest CPUs and make the layout more text-based on those boards in order to add support for newer CPUs.

They later released MAX versions of those boards which have a 32 MB BIOS chip:



Then they could offer all the features and nice graphical BIOS design again.

So today, 32 MB BIOS chips are standard, otherwise they might run into size constraints when they want to add new features or support more hardware later.
 
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Well, he's from Saudi Arabia and the RMA would be with MSI USA, since he ordered it from Newegg. It's good of them to even offer it, but financially absurd, as the board costs less than the shipping.
True, but even if I order from local shops they all offer 1 year warranty like Newegg,
I asked if possible to send for repair in Saudi Arabia or a near country but they said only in USA for motherboard/VGA products.
" Please note that motherboard/VGA products do not have global warranty coverage" MSI Customer Support.

Which means after 1 year I have to send it back to USA regardless where I bought it from. This is the case with most manufactures.
I am not complaining and I understand why the customer service asked me to pay for the shipping, just explaining my situation and that is why I am trying to solve using the programmer as it is the only solution I have.

If I can't fix it I will buy a new motherboard also from MSI, 'Love MSI', but I will choose one with BIOS Flash Button this time.

[QUOTE="
No motherboard BIOS is 256 KB nowadays. You could't fit anything in there. It's 256 Mbit, which is 32 MB. This is pretty much the universal BIOS chip size now.
So today, 32 MB BIOS chips are standard, otherwise they might run into size constraints when they want to add new features or support more hardware later.
[/QUOTE]
It says 2 Mbit, I guess the programmer did not work for my chip, that is why I need to know if someone with same chip as mine got the same problem or not.


citay, thank you for your helpful information (y)
 

TuXEKR156d02de

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Ah, so you wanted to know what kind of BIOS chip was on other people's board, because you successfully flashed a certain BIOS chip on your Z490 Tomahawk with your external programmer?
@
[USER = 948237] TuXEKR156d02de [/ USER]


¿Qué programador usaste?

Aparentemente, el modelo gaming edge wifi z490 usa el mismo chip bios que tomahawk

MX25L25673G
Yes, he did it successfully. I am documenting everything that I have done for anyone who has no doubt about it. The programmer used is the "XGecu TL866II Plus".

I was also analyzing the possibility of acquiring the chip and reprogramming it so that whoever wants to can buy the chip and only have to solder it on the board (8 pins), it is a relatively simple solder. The problem is that the chip is quite expensive, between € 5-10 within Europe. But much cheaper than the programmer.
 

TuXEKR156d02de

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BIOS FLASH TUTORIAL

I have just compiled all the information and I have captured it on my blog. I leave the link here, it is in Spanish, but with google translate it should be fairly well understood.

I would appreciate if you could give me your feedback and use the blog comments (no registration required).

Any questions, quote me or write a comment and I will try to help you as much as possible (and if necessary clarify it on the blog).

@stro152c02d9 @citay

Link: https://am.xekro.com/flash-bios-msi-mag-z490-tomahawk/
English translate: https://am-xekro-com.translate.goog...r_sl=es&_x_tr_tl=en&_x_tr_hl=es&_x_tr_pto=nui
 

Furna

The sky above the port was the color of television
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on my z490 gaming carbon wifi the bios chip is "winbond 25X20CLNIG"
Using ch341a and AsProgeammer it did not detect automatically, I searched and found "winbond 25X20CL" but every time I try to right on the chip using MSI BIOS I get this error "Fiels Size Is larger Than IC"
need help please.
Did you try to read the chip? I understand the content is corrupted, anyway at least you can have a confirmation that connection is good.
Also what about voltages? Did you modify the ch341a? Are you using a clamp or jumper wires to the TPM connector?
You can contact me in PM if you feel so.
Or @citay can give us permission to "abuse" his thread?
 
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Did you try to read the chip? I understand the content is corrupted, anyway at least you can have a confirmation that connection is good.
Also what about voltages? Did you modify the ch341a? Are you using a clamp or jumper wires to the TPM connector?
You can contact me in PM if you feel so.
Or @citay can give us permission to "abuse" his thread?
I sent you a PM.
Thank you
We can share the information here if we find a solution
 

citay

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BIOS FLASH TUTORIAL
Well-written tutorial. Yes, the external programmer you used is quite expensive, but you can probably can sell it again with minimal losses.

One thing about identifying the BIOS chip: Look towards the bottom of the board first, a lot of times it will be located there. Whenever your board has a chip with 8 pins and "Winbond" written on it, you're lucky, it can only be the BIOS chip. But it's not always from Winbond. The board will also have other 8-pin chips next to each fan connector, but with "Nuvoton" written on them, but anything from Nuvoton is usually related to fan control / voltage control and not the BIOS chip.

edit: I made a picture with the precise location for most MSI Z490 boards: https://forum-en.msi.com/index.php?...ecent-bios-updates.367575/page-7#post-2086175

We can share the information here if we find a solution
Yes, it would be good to discuss is between yourselves, and when you have it figured out, you can write a tutorial or so, if you want.
 
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