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  1. 03-13-2021 11:50 PM #1
    Falconeer5
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    Maximus XII Apex (Z490) Flashback light won't turn on, can't boot

    Something is seriously amiss with my mobo. I can't switch from bios a, the flashback light won't turn on when I try to flash bios. I've removed ram, gpu, unplugged everything except the panel buttons and power (my system drive is an M.2 NVMe that's still installed). I've tried power off at the psu, unplugging psu, removing cmos battery for ten minutes, nada.

    I've already had to RMA this board once (was my fault, nothing against Asus) and I'd hate to have to try RMAing again.

    Any help would be most appreciated.
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  2. 03-14-2021 03:01 AM #2
    geneo
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    I assume you have done this before and know of the naming convention for the BIOS file.



    Only thing I can suggest that you didn't mention to try is to reflash your current BIOS with an official BIOS using EZupdate.
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  3. 03-14-2021 12:53 PM #3
    Falconeer5
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    Correct, I used the renamer program and ensured the file is at the root of the usb.

    I can't get into bios so can't use ezupdate.
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  4. 03-14-2021 01:18 PM #4
    EncodeGR
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    Is your usb drive properly formated ? (FAT32)
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  5. 03-14-2021 04:01 PM #5
    geneo
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    Quote Originally Posted by Falconeer5 View Post
    Correct, I used the renamer program and ensured the file is at the root of the usb.

    I can't get into bios so can't use ezupdate.
    Oh, you can't even boot your computer? Maybe RMA time, sorry. Read text not thread title.
    Last edited by geneo; 03-14-2021 at 04:29 PM.
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  6. 03-14-2021 04:06 PM #6
    lLegendaary
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    Hello ,

    Does your motherboard LED/Qreader ON ? or just everything without power ?
    rest everything [ unplug then plug everything ]
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  7. 03-14-2021 04:34 PM #7
    geneo
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    Yeah, if the motherboard is getting power, maybe the flashback LED is dead. You could try pressing it , then waiting 5 minutes just to make sure.
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  8. 03-14-2021 05:43 PM #8
    lLegendaary
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    Quote Originally Posted by geneo View Post
    Yeah, if the motherboard is getting power, maybe the flashback LED is dead. You could try pressing it , then waiting 5 minutes just to make sure.
    It's harder that QLED defective without reason .
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  9. 03-15-2021 02:33 AM #9
    Saltgrass
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    Could I just verify what you are attempting?

    You put the renamed Bios update on the flash drive and plug it into the correct USB port while the system is shut down.

    You then hold the Bios Flashback button for three seconds until the light blinks 3 times. The Clear CMOS light is the only light on on the back.

    If the system has two Bios chips, does it make a difference as to which one is chosen for booting?

    If the Bios update fails or leaves the system in an inoperable state, it can be recovered using the special CrashFree utility..
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