Great, good to know. My question is, can I take out the USB Drive that is plugged in right now that I tried these steps on? The solid green light is on, and I'm wondering if I can just pull it out without causing any damage to the motherboard. Pretty sure a solid light means the procedure didn't start. The light should be OFF when it's done. You can shutdown the system. It's fine. The BIOS flashback didn't work or should I say didn't start. Answer from Nemesia on forums.tomshardware.com
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Reddit
reddit.com › r/asus › flashback solid green light
r/ASUS on Reddit: Flashback solid green light
December 9, 2020 -

Help me im about to smash this fucking motherboard to pieces its an ASUS x570 ROG STRIX F GAMING. Ive been trying for about 7 hours to flash my bios something ASUS claims take 5 mins using their flashback button. Well every single avenue ive tried I get 3 green flashes followed by a solid green light. Ive formatted my usb stick and set to FAT32. Ive tried windows and Bootice so far to no avail. Ive tried multiple USB sticks and it appears whatever has gone on my first USB stick I tried has been killed. Ive cleared the CMOS and tried again. Ive triple checked im downloading the right bios thats compatible with my motherboard after seeing someone else have this trouble. Ive tried with just the motherboard connected to the PSU, ive tried it as a full system with the new 5600x with the RAM and everything plugged in asif it was a working PC. Im at a complete loss, wait months for my new stuff to arrive for this shit to happen. Please please please can anyone offer any advice

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ASUS
asus.com › support › faq › 1038568
[Motherboard] How to use USB BIOS FlashBack™? | Official Support | ASUS Global
April 9, 2026 - A3: Please confirm if there are ... Q4: If the light flashes for five seconds and turns into a solid light, this means that the BIOS FlashBack™ is not operating properly....
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Reddit
reddit.com › r/asus › [solution] bios flashback issue with light becoming solid when it should be blinking
r/ASUS on Reddit: [Solution] Bios Flashback issue with light becoming solid when it should be blinking
January 9, 2021 -

Just leaving this here incase it helps anyone else.

Needed to update a recently bought ASUS ROG Crosshair VIII Hero X570 (non-wifi) to be able to use x5000 series CPUs.

First few attempts after following directions to put properly renamed via biosrenamer.exe .CAP file on USB were unsuccessful and produced a solid blue light after holding down the bios flashback button for three seconds/three blue blinks. (note: no cpu or ram attached to the board)

What ended up making it work was needing to do a bit more of an involved format job, windows device format alone wasn't effectively automatically reducing the USB to a single partition. This is actually a pretty critical step to ensure the motherboard reads the usb stick.

Not entirely necessary to format to FAT16, but that's what I tried at first. To do so, I used diskpart to remove the extra partition that was appearing, and also ensuring a single partion remained of size 4000 on it (command for this using diskpart with the proper partition and disk selected: "create part primary size=4000"). and then, going back to windows right-click format tool, formatted to FAT16 (also just called FAT) ensuring a single partition of size 4000 on it.

Just a possible solution to try for anyone else who has been frustrated by this.

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Visioncomputers
visioncomputers.com › asus-bios-flashback-solid-light
ASUS BIOS Flashback Solid Light: 5 Fixes for a Failed ...
March 22, 2026 - Sorry, but the page you are looking for does not exist, have been removed, name changed or is temporarily unavailable
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Asus
rog-forum.asus.com › t5 › gaming-motherboards › nib-rog-strix-x670e-e-bios-flashback-light-stays-green-for-hours › td-p › 1017300
Solved: NIB ROG STRIX X670E-E BIOS Flashback light stays g... - Republic of Gamers Forum - 1017300
May 17, 2024 - NIB ROG STRIX X670E-E BIOS Flashback light stays g... ... I have a new AMD Ryzen 9 7950X3D on a Strix X670E-E. I flashed the firware to latest (v2007) and installed Ubuntu as a test. All was good for about a day, then I couldn't POST after a reboot. I've tried reflashing with 2007 and 1905 with no luck - the Flashback light blinks a few times then goes solid and stays that way.
Find elsewhere
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Asus
rog-forum.asus.com › t5 › rampage-vi-strix-x299-series › bios-flashback-not-working-at-all-please-help-solved › td-p › 758259
Bios flashback not working at all please help [SOL... - Republic of Gamers Forum - 758259
March 7, 2024 - Hello everyone TODAY I HAVE A BIG ... into the USBs BUT no matter how many times i try the flashback bios it Doesnt work at all the FLASHBACK BIOS LED Light turns solid Blue and wont continue Blinking after i release my finger from the key this means that the BIOS Flashback ...
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Linus Tech Tips
linustechtips.com › computer hardware › cpus, motherboards, and memory
ASUS USB BIOS flashback solid light? URGENT! - CPUs, Motherboards, and Memory - Linus Tech Tips
August 8, 2015 - https://linustechtips.com/topic/425984-asus-usb-bios-flashback-solid-light-urgent/ More sharing options... Followers 1 · Go to solution Solved by Valkyrie Lenneth, August 8, 2015 · solid blue means its like finished for my board · blinking = flashing/working at it ·
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PCPartPicker
pcpartpicker.com › forums › topic › 392106-solid-green-light-whilst-updating-bios-on-asus-b550-e-motherboard-without-cpu
Solid green light whilst updating bios on ASUS B550-E motherboard without CPU - PCPartPicker
... Inserted usb stick in the slot next to the flash button on back panel of mobo. ... Switch on - lights come on indicating mbo is powered up. Hold down flash button for 3 seconds. Anyone notice if I missed something? Do you need to install previous bios versions?
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Eleven Forum
elevenforum.com › windows support forums › diy builds and motherboards › asus
ASUS ROG Strix Z790-A Gaming LGA 1700 - BIOS 1801 - Update problems ? | Windows 11 Forum
February 3, 2024 - According to manual it says "Press ... And noticed this: "If the light flashes for five seconds and turns into a solid light, this mean the BIOS FlashBack is not operating properly....
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Asus
rog-forum.asus.com › t5 › gaming-motherboards › bios-flashback-blinking-can-t-power-on › td-p › 1067009
BIOS flashback blinking / can't power on - Republic of Gamers Forum - 1067009
January 7, 2025 - This stops the infinite loop as the LED stops blinking and becomes solid green, indicating that Flashback failed (obviously, there is no USB Drive inserted) and the power button is re-enabled.
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Asus
zentalk.asus.com › t5 › motherboards › prime-b650m-a-wifi-bios-flashback-light-keeps-blinking-and-pc › td-p › 441606
Solved: PRIME B650M-A WIFI BIOS Flashback light keeps blin... - ASUS - ZenTalk - 441606
October 4, 2024 - PRIME B650M-A WIFI BIOS Flashback light keeps blin... ... I'm using PRIME B650M-A WIFI motherboard and had no problems at all for about 9 months. But I'm currently having problem where BIOS flashback LED keeps blinking (not solid which indicates fail) and the PC won't boot at all (no light or fan).
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Asus
rog-forum.asus.com › t5 › gaming-motherboards › z790e-gaming-wifi-bios-update-quot-not-proper-quot-solid-green › td-p › 1119273
Z790E Gaming WiFi - BIOS update "not proper"/solid green light
October 11, 2025 - 2) Follow this video to rename the bios file and put it on your usb flash drive. ... 7) When the blinking stops, start your pc. It may continue to update during start up, let it do its thing until it boots to windows. ... Thank you very much for the reply and the detailed steps. I followed the steps exactly and achieved the same result. Solid green light on flashback.
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H|ard|Forum
hardforum.com › [h]ard|ware › motherboards › intel mobos
USB BIOS Flashback Not Working | [H]ard|Forum
January 10, 2017 - I have an ASUS P9X79 Deluxe. I cannot get the ASUS USB BIOS Flashback to work. I push the USB Flashback button and release when the light starts to flash. Light flashes 3 times and then the LED on the button stays solid. No activity on the USB drive. I have tried the following: Format a 16G...
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ASUS
asus.com › support › faq › 1053582
[Desktop] How to use USB BIOS FlashBack™ Update BIOS? | Official Support | ASUS Global
July 12, 2024 - 10. When the BIOS FlashBack™ indicator light goes off, it means that the BIOS update is complete.
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Asus
rog-forum.asus.com › t5 › z170 › the-flashback-button-does-not-seem-to-work › td-p › 619450
The flashback button does not seem to work - Republic of Gamers Forum - 619450
March 7, 2024 - Are you renaming only the file and transferring only the file, not the folder to the root of the USB drive?* Other than that I've been clearing the cmos first so you are at default settings before flashing and I've been shutting the PSU off inserting the drive then switching it on followed by pushing and holding the flashback button until the button (also on M8E bios light) begins the flash on and off.