Question BIOS Won't Flash

[Shisimona]

I currently have version 5007 on my ASUS Prime X470 Pro. I'm trying to update the BIOS to version 5406, but when I try to flash, it gets to about 25% and the system restarts. I've tried USB and Via Internet. Same thing each time. I updated to version 5007 back in July without any issues. Any suggestions on what to do? I do clear CMOS before I do any sort of BIOS flash.

 

[Zizo007]

I currently have version 5007 on my ASUS Prime X470 Pro. I'm trying to update the BIOS to version 5406, but when I try to flash, it gets to about 25% and the system restarts. I've tried USB and Via Internet. Same thing each time. I updated to version 5007 back in July without any issues. Any suggestions on what to do? I do clear CMOS before I do any sort of BIOS flash.

Do not jump bios versions, Flash every update step by step.

 

[Shisimona]

I've already done that. Still won't flash.

 

[Ketchup79]

How are you flashing - from the BIOS or through Windows?

 

[Shisimona]

Through the BIOS.

 

[Ketchup79]

Use the Windows app. Much easier and foolproof.

 

[Shisimona]

Still doesn't work.

 

[Ketchup79]

Still doesn't work.

Detail please. Did you let it search for a file on it's own or did you direct it to the file you already had?

 

[bignastyid]

Try one of the bios versions between 5007 and 5406. I also recommend flashing through bios(EZ Flash) rather than windows. Also make sure the flash drive you are using is formatted in FAT32

 

[Shisimona]

The Windows EZ Flash I find, is useless. It always says everything is up to date, when it's not. I have to use file from the ASUS. And I rather not use a Windows program to flash a BIOS. I've read many stories about people bricking their motherboards for it. I figured it I try it. No go.

I rather flash through the BIOS. Been doing it that way for many, many years. I just never ran into this issue before. The closest it got to finishing is when I tried to back flash to 4804. It restarted at 95%. I'm going to try 4602, which was on the motherboard when I got it. Anything over 5007, restarts around 25%. I've also tried about 10 different USB sticks, all the same outcome. I'm thinking, I might have to contact ASUS and send in for warranty.

 

[Ketchup79]

Asus EZ flash is what you want, not some 3rd-party tool.

[Motherboard] EZ Update - Introduction | Official Support | ASUS Global

And while BIOS-level should be fine, having updated dozens of BIOSes through Windows-level utilizes (and a few without), I have never had a problem.

 

[Zizo007]

Do nowdays motherboards have dual bios?
That way if one is broken you switch to the other. I have a socket 775 Gigabyte motherboard that has dual bios.