Asus zenbook UX490u bios

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  • pirati
    ASUS Zenbook Pro Duo UX8402ZA BIOS
    by pirati
    Hello everyone,

    I recently bought a non-working Asus Zenbook Pro Duo OLED UX8402ZA that was listed for parts only. The seller mentioned that it had no display output but that the charging lights worked.

    When the laptop arrived (without a charger and SSD), I connected a charger and confirmed with a multimeter that it was charging the battery. However, when I tried to power it on, only the backlight of the secondary display came on. There was no image, and it didn’t boot into the BIOS.

    I decided to try flashing a new BIOS, but since I didn’t want to desolder...
    10-27-2025, 04:20 PM
  • razor_amd
    [TUTORIAL] fix asus bios with bios from asus web support (by razor_amd)
    by razor_amd
    With ASUS, not everything is quite so simple. I will show you my way. It may be longer or harder but it is the right way to do it in my humble opinion.

    For example, you can have 3 similar ASUS motherboards, all being the same model, all of which will have different BIOS versions.

    I will give you an example and my version of preparing BIOS from ASUS website and in the process I am always cleaning Intel ME while doing it so you have fully cleaned BIOS, no DMI data, no password, nothing.

    This is the picture of 3 similar ASUS motherboards, all of them being X555LD...
    12-15-2020, 07:07 PM
  • grimacelord
    ASUS TUF GAMING Z790-PLUS WIFI - BIOS Help
    by grimacelord
    Hello,

    I have spent the last hour on this and I guess this is just over my head, so here I am.

    I have an ASUS TUF GAMING Z790-PLUS WIFI motherboard here that needs to have the BIOS updated in order to accept the latest CPUs.

    The BIOS chips seem to come as a set of two: GD25B64ESIG and GD25B128ESIG. My guess is one of them is a fail-safe for the main BIOS? I really don't know. Or one of them is ME and other is BIOS? I don't know.

    Anyway, I took dumps of both chips and then downloaded the latest update for this motherboard from ASUS's website...
    07-10-2025, 02:52 PM
  • mkdj
    ASUS ZenBook UX480F : need help with cleaning the ME region of my BIOS dump
    by mkdj
    Dear all,
    I have a ASUS ZenBook UX480F with the following symptoms:



    I suspect it is a BIOS issue. So I decided to try to clean the ME region. I followed the guide on win-raid, and I believe I have done everything correctly. My problem is: when I open the outimage.bin in ME Analyzer, it says that it is Extracted, and not Region, Extracted as it should be. Is it normal, or did I do something not correctly? This is my first experience editing BIOS files.

    I would appreciate if someone could take time to explain the issue, so that I can learn. But I would...
    10-19-2025, 04:41 AM
  • jbonavita
    ASUS TP500LA BIOS request/repair/merge?
    by jbonavita
    Hi, my laptop wont boot at all
    With original bios no POST, only LED lights
    With alternative BIOS from model TP500LN (flashed via programmer) the notebook works again
    Some issues
    A- with bios from 500LN, it won't update from bios of model 500LA (from 500LN v203 to 500LA v300)
    B- If updated from 500LN version 203 to 300, the battery stops being recognized

    Things I tried

    1- Update / clear ME: Took the non working bios, made a backup, and did this: https://www.badcaps.net/forum/troubl...theory/trouble...
    04-29-2025, 09:38 PM
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