Asus Zenbook UX390U N/S H3N0CY00E89912D, unfortunately I can't figure out where the serial number of the mainboard is. Stuck on BIOS password. Working until 2 days ago but tired of entering password at every reboot, I tried to remove it following the instructions, but something went wrong and since then I can't access. I'm desperate. I tried all the ways found on the web, but I can't locate where this CMOS jumper is or the buffer battery (I doubt it has one). Thanks everyone.
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You MUST:- Read BIOS guides, methods, resources and tools
- Try the method at BIOS guides, methods, resources and tools before requesting help
- Explain you were not able to succeed with the methods at BIOS guides, methods, resources and tools
- Use search function in case someone already answered your request
- Post under a related thread if it exists
- Provide the full machine model number, serial number (or Service tag, SNID) and the board model number (see https://www.badcaps.net/forum/showthread.php?t=88758 ) ,The serial number, make, full model number, motherboard model and revision (except QR codes) must be written/typed at your request as per the rules. Not as a picture, part of the file name and so on.
- Name your thread with make, full model numbers and request
- Provide a BIOS/EC dump if possible
- Attach files directly to your post instead of linking to external websites
- Post what the problem is, be specific - black screen, no boot, running slow, password. Do NOT post "clean me", "clear bios", "clean bios", "fix bios", "bios need" or other such terms
Post a bios backup even if it's corrupt.↵
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good morning. unfortunately I don't have a backupComment
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Any donations to badcaps are welcome, click this link to donate . Thanks to all the supporters
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I wanted to remove the bios password, I entered the one I knew and left the "new passwords" fields blank. When I restart it asks me for the password and all the ones I enter are invalid.
I don't know what to do... the PC doesn't have a cmos battery (at least I can't find it) to try a resetComment
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EccoComment
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You don't know what the current bios is ? It's the bios in your computer, not the file downloaded from the ASUS homepage.
https://www.youtube.com/results?sear...41a+flash+biosLast edited by hoaca388; 06-29-2025, 06:59 AM.↵
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I downloaded this from the site, but it's the one I had installed. I don't have a backupComment
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I bought the programmer on Amazon and it will arrive tomorrow... I'll post a photo of the mainboard: could you tell me the bios chip??? I'm a novice. ThanksAttached Filesif you find these attachements useful please consider making a small donation to the site
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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... -
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... -
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... -
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... -
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...
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