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Cannot boot Mojave Installer or OS: Asus H370-I BIOS version 2012

Joined
Jun 16, 2010
Messages
122
Motherboard
ASUS PRIME B360M-A
CPU
i3-8100
Graphics
RX 570
I have an ASUS B360M-A and just made the same mistake... Surely there must be a way to downgrade the BIOS?? Anyone? I'm also getting the "not a valid BIOS" error when trying to downgrade.
I found this method to manually update BIOS without using EZ Flash:

 
Last edited:
Joined
Mar 2, 2019
Messages
7
Motherboard
ASUS H370-I Gaming
CPU
i5-8500
Graphics
RX 580
Hi,
seems like I damaged my bios by flashing back the board to the previous version using afuwin. When I now start the computer the fans are working but no display.
Is there a way to fix the bios or do I now have to get a new board? :thumbdown
 

P1LGRIM

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Joined
Mar 2, 2019
Messages
7
Motherboard
ASUS H370-I Gaming
CPU
i5-8500
Graphics
RX 580
No, CMOS reset didn’t help.
Also tried the Asus Crash free bios 3 way. If I understand that right just plugging in a fat32 formatted usb drive containing the bios is all. But nothing is happening except that the fans are starting when I turn on the computer.
 
Joined
Jun 16, 2010
Messages
122
Motherboard
ASUS PRIME B360M-A
CPU
i3-8100
Graphics
RX 570
This is why I haven't tried reflashing via DOS, I'm scared the same thing will happen to me! I'm currently emailing with ASUS support to try to figure out what they changed in this version of BIOS that prevents MacOS from booting. Perhaps there's some new setting enabled that's causing a conflict?

Also (though maybe I'm being too optimistic) perhaps the next release of BIOS could fix the error? If enough of us complain to ASUS!
 
Joined
Mar 2, 2019
Messages
7
Motherboard
ASUS H370-I Gaming
CPU
i5-8500
Graphics
RX 580
That was my hope, too. Should have waited...
So I guess that’s it with my board or is there still a chance?
 
Joined
Jun 18, 2015
Messages
83
Motherboard
Gigabyte Z390 Aorus Master
CPU
i5-9600K
Graphics
Vega 56
I have an ASUS B360M-A and just made the same mistake... Surely there must be a way to downgrade the BIOS?? Anyone? I'm also getting the "not a valid BIOS" error when trying to downgrade.
I found this method to manually update BIOS without using EZ Flash:

Hello, i try this on Asus Prime H310T with BIOS 2012, it finished successfully, but after restart there is still same 2012 BIOS (i try to downgrade to previous BIOS 1405).
BIOS 2012 is a disaster for ASUS users :thumbdown
 
Joined
Jun 16, 2010
Messages
122
Motherboard
ASUS PRIME B360M-A
CPU
i3-8100
Graphics
RX 570
I read something about the new BIOS being write protected... that would explain why.

My latest reply from ASUS support:
"I appreciate your patience and understand that this may be a hassle. I assure you that it is important to us that your issue gets resolved and we will continue to work diligently to do so.
Kindly fill out the motherboard feedback form so we can forward your issue to our product engineers."

Worth a shot I guess.
 
Joined
Mar 5, 2019
Messages
4
Motherboard
Asus Prime H310m-a
CPU
I5-8400
Graphics
UHD 630
I have the same issue with Asus Prime h310m-a motherboard, still waiting for the solution from others, seem like downgrade bios using afuwin is not affected, hope it will fixed as soon as possible :<
 
Joined
Nov 22, 2016
Messages
5
Motherboard
ASUS ROG STRIX H370-I Gaaming
CPU
i5-8400
Graphics
RX 560
Mac
iMac, MacBook Pro
Mobile Phone
Android, iOS
any news? Had the same thing on my ROG STRIX h370-I Gaming.
I'm curious if it's possible to downgrade bios using this method https://www.asus.com/support/FAQ/1030111
Has anybody tried to flash it under win?
 
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