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BIOS update failed, now system won't go into BIOS

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philb2

2[H]4U
Joined
May 26, 2021
Messages
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Motherboard is MSI X870E Carbon WiFi, maybe 3 months old. Actually I needed to reinstall Windows (TL:DR) but I ran into issues with a downrev BIOS. So like a good boy I downloaded the latest BIOS, RTFM'ed the manual and proceeded.

Now the system won't even boot into BIOS. And the display screen is dark. And I can't power down the system by pressing the power button even for 30 seconds.

So how bad is this situation? Did I brick an expensive motherboard?
 
The super IO chip is responsible for communicating to power on/off signal to the PSU so I'd say that chip has an issue and it's time for RMA. I don't think you bricked it by flashing the bios I think the issue was already there. Any physical damage near the super IO chip that you can see?
 
One of the best features all AM5 motherboards have is BIOS flashback, which doesn't even require a CPU to be installed (but you can leave it in).

Look up how to do a BIOS flashback on your motherboard. It's fairly simple as long as you have a FAT32 formatted thumb drive and can rename the BIOS file correctly.

EDIT - page 73 of your manual. https://www.msi.com/Motherboard/MPG-X870E-CARBON-WIFI/support#manual
 
learners permit said:
The super IO chip is responsible for communicating to power on/off signal to the PSU so I'd say that chip has an issue and it's time for RMA. I don't think you bricked it by flashing the bios I think the issue was already there. Any physical damage near the super IO chip that you can see?
Click to expand...
I will have to look. It's late now.
 
learners permit said:
The super IO chip is responsible for communicating to power on/off signal to the PSU so I'd say that chip has an issue and it's time for RMA. I don't think you bricked it by flashing the bios I think the issue was already there. Any physical damage near the super IO chip that you can see?
Click to expand...
I RTFM'ed the MSI manual but couldn't find a diagram identitying the chips on the motherboard, So I did a Google search and the end of that response was something like, "What is your problem?" So I explained the problem and the final result was a recovery guide. Which worked!! :)

If there is interest, I can upload this guide here. It was specific to my motherboard and had a few minor errors, but it worked. :)

EDIT: Forgot to say that I also called MSI USA support, and the tech seemed helpful but told me that I needed to RMA the board to get a warranty fix. Glad I checked with Google.
 
If you have a discrete GPU, try moving your monitor cable from the GPU to one of the onboard display outputs. Also I would try removing the GPU, reboot and see what you see. Could be the motherboard is outputting video there but you just can't see it.
 
Had this problem with a laptop once. Unplug your pc, go into the motherboard and remove the CMOS battery if it has one, hold the power button down for 30ish seconds, then leave it alone for a few hours. That might break some infinite loop of retardery it got stuck in, come back a few hours later and reinstall the battery and power it up again in safe mode. If that doesn't work, sadly it's show at a hardware level and will need to be replaced. Thankfully, all the data on your hard drive should be safe and if you need to access it quickly the bitlocker recovery keys to decrypt it should be saved to your MS account.
If it's 3 mo old I would say it's ethical to just order another and return it as defective to get a refund.
 
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