MSI MAG B550 TOMAHAWK - CPU error, boardview REQ

[Zakyn]

Hi, I've MSI MAG B550 TOMAHAWK, which stuck on CPU error (red EZ debug LED is on).
1. I've tried to flash BIOS from USB with no success (stuck on red LED blinking).
2. No component is overheating.

Does anyone have boardview of this mobo? I would like to trace the problem, but without boardview is pretty hard task. Thanks for any help.

[McWhitePink]

Re: MSI MAG B550 TOMAHAWK - CPU error, boardview REQ

Likely to be a common issue with this board. I have 4 boards have the same issue.
one of them was flashed with latest BIOS and works alright, but when I tried to flash it the second time the same issue happened.
If you see the flash back LED blinking you should wait for more time. it takes minutes to go next step

[Zakyn]

Re: MSI MAG B550 TOMAHAWK - CPU error, boardview REQ

I have waited 15-30 minutes each try, tried different USB sticks with various BIOS versions. I managed to get schematics and boardview so I will track singals of power sequence and hopefully find out what is going on.

[McWhitePink]

Re: MSI MAG B550 TOMAHAWK - CPU error, boardview REQ

I have waited 15-30 minutes each try, tried different USB sticks with various BIOS versions. I managed to get schematics and boardview so I will track singals of power sequence and hopefully find out what is going on.

I think you are getting the same issue as I have for 4 of my B550 TOMAHAWK, onboard flashback doesn't work correctly for some reason. I flash them with offline SPI programmer, they are now all come back to normal.
Same symptom, stuck on CPU debug light. I checked all voltage and signals, all seems working good. Then I just try my luck to flash the BIOS, and it works.

[Zakyn]

Re: MSI MAG B550 TOMAHAWK - CPU error, boardview REQ

I think you are getting the same issue as I have for 4 of my B550 TOMAHAWK, onboard flashback doesn't work correctly for some reason. I flash them with offline SPI programmer, they are now all come back to normal.
Same symptom, stuck on CPU debug light. I checked all voltage and signals, all seems working good. Then I just try my luck to flash the BIOS, and it works.

Do you still have them? I accidentaly erased SPI flash memory, without backup Can I ask you for favor? I really need dump of that memory. Its part U46.

I managed to get boardview and schematic:

[stj]

Re: MSI MAG B550 TOMAHAWK - CPU error, boardview REQ

go to msi - unlike a lot of companies there bioses look to be complete.
i'v not looked at a B550 but i can tell you the B350 bios is complete at msi site

btw - this may interest you

[Zakyn]

Re: MSI MAG B550 TOMAHAWK - CPU error, boardview REQ

go to msi - unlike a lot of companies there bioses look to be complete.
i'v not looked at a B550 but i can tell you the B350 bios is complete at msi site

btw - this may interest you

Thanks, I will take a look on that.

[stj]

Re: MSI MAG B550 TOMAHAWK - CPU error, boardview REQ

incidentally,
there is a pattern to this,
a lot of modern boards - specially MSI brick a lot.
the problem is trying to flash the bios from windows - dont ever use the software they supply that updates the bios from windows.
dont use *any* bios tools from windows - only from a bootable dos device.
even the flasher built into the bios - Mflash? is said to be unreliable.

if you want evidence, just type "msi bios recover" into a search engine!!!

[f-bone]

Re: MSI MAG B550 TOMAHAWK - CPU error, boardview REQ

Do you still have them? I accidentaly erased SPI flash memory, without backup Can I ask you for favor? I really need dump of that memory. Its part U46.

I managed to get boardview and schematic:

would love a copy of U46 too

[f-bone]

Re: MSI MAG B550 TOMAHAWK - CPU error, boardview REQ

here is my u46 dump.. I see the remont forum has some info but I am not registered to see details.

U46 https://www.badcaps.net/forum/showthread.php?t=125760
.

[McWhitePink]

Re: MSI MAG B550 TOMAHAWK - CPU error, boardview REQ

Do you still have them? I accidentaly erased SPI flash memory, without backup Can I ask you for favor? I really need dump of that memory. Its part U46.

I managed to get boardview and schematic:

For MSI B550 you don't really need to have the BIOS dump, you can directly flash the BIOS you download from MSI website.
I compared the dump with the one downloaded, they are identical binary file.