Hi everyone I need a working bios dump file for this model Lenovo G40-80 notherboard id:ACLU3/ACLU4 UMA NM-A362 REV 1.0 thanks in advance
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Re: Lenovo G40-80 bios
The problem with this laptop turns on and boots fine in windows aftet i shut down cannot turn on again But if you remove cmos battery and put it back it turns in fine after shut it dwn the same issue i need to remove at put back cmos battery to turn on.please help -
Re: Lenovo G40-80 bios
Ill aready done update the bios but evertime i shutdown cannot turn on again i need to remove cmos battery to turn on the laptop.please helpComment
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Re: Lenovo G40-80 bios
anyone please helpComment
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Re: Lenovo G40-80 bios
Anyone please helpComment
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Re: Lenovo G40-80 bios
Thanks for the response ill try thisComment
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Re: Lenovo G40-80 bios
I cannot download your files it says does'nt exist can you please upload it hereComment
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Re: Lenovo G40-80 bios
Need help on this please share working bios file the problem on this laptop i need to remove and put it back the cmos battery in order to turns on and boots fine please helpComment
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Re: Lenovo G40-80 bios
Backup the old one, Try this:Comment
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Re: Lenovo G40-80 bios
thanks meritosari ill try this and feedback soon thank youComment
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Re: Lenovo G40-80 bios
meritosari ill flash the chip with your bios file laptop turn on and shuts off. while original bios dump file the problem is only i need to remove the cmos battery everytime to start the laptop.Comment
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Re: Lenovo G40-80 bios
can someone please help i have attached the original bios can someone please fix this i need this urgent please. original is working the only problem is i need to remove and put back the cmos battery i order to turn on.Comment
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Re: Lenovo G40-80 bios
Romulo, try and find the switching pin on SIO. Just connect that pin from SIO to power switch. It will resolve your case. This is not a bios issue.Comment
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Re: Lenovo G40-80 bios
thanks for the response mcplslg123 could you please show me where to find and connect this switch?I have attached the full image of the board. please help meAttached Filesif you find these attachements useful please consider making a small donation to the site
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Re: Lenovo G40-80 bios
Please helpComment
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Re: Lenovo G40-80 bios
PleaseComment
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Re: Lenovo G40-80 bios
Finally solved the problem i flashed back from the original bios back up file and the find sio pin short to 3.3v power switch and test the laptop on without cmos works fine and put back cmos battery works fine and test for hours now wrking fine thanks everyone for the helpComment
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Summary of BIOS Whitelist Removal Problem
Problem:
I am attempting to remove the WWAN card whitelist from my Lenovo ThinkPad T560.
Initial Findings:- My current BIOS version is N1KET58W (1.45).
- I have a CH341A programmer and have successfully created two full backups of my BIOS.
- I have the ability to use command-line tools on a Linux machine.
- I attempted to use several automated and manual patching methods on my N1KET58W (1.45) BIOS, including using hex strings. These attempts all failed.
- I concluded that the
08-12-2025, 03:01 PM -
Hello,
I have a Lenovo Thinkbook 15 G2 ITL i5 Laptop (serial number: MP2BFZEF) that when I turn it on, the led on the power button lights up for 5 seconds, then goes out. There's no display and nothing happens.
So I thought it was a Bios problem.
I found 3 bios chips on the board, which I read with a bios programmer: two XMC model bios chips and a Winbond model bios chip. Each XMC model bios chip has two partitions named XM25QH128A [3.3V] and XT25F128A [3.3V]. And the Winbond model bios chip has three partitions named W25Q80BL 3.3V, W25Q80xV 3.3V and W25Q80DV 3.3V.... -
Hi everyone,
My Lenovo Legion Y540 (i7-9750H, RTX 2060) bricked after I downgraded from BHCN44WW to BHCN21WW.
Laptop stopped booting entirely.
I used a CH341A programmer to dump the corrupted 16MB BIOS.
i then attempted the following:- Downloaded stock BIOS BHCN39WW from Lenovo
- Trimmed it to 16MB
- Extracted the BIOS region from the corrupted dump
- Extracted the BIOS region from the stock 39WW
- Replaced the corrupted BIOS region with the stock one (within hxd , opened the corrupted dump and replaced its region by the stock)
- Injected back my LDGB / DMI
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Hello there.
I am working on a Lenovo Legion T5-26AMR5 desktop that currently has a corrupt BIOS and I have been unsuccessful thus far in trying to fix it myself.
History:
1. This computer came to me initially with an error message that said "BiInitializeLibrary failed 0xc0000001" or "0135 fan error". It would always be one of the two errors. It should be noted that when it produced the fan error, there was no physical problem with the fans. They were all spinning just fine.
I searched for this error online and discovered... -
Need Clean BIOS/EC Bin File for Lenovo ThinkPad Yoga 11e - Stuck with 0275 Error CMS
Hello everyone,
I am attempting a repair on a Lenovo ThinkPad Yoga 11e that is currently stuck at boot with the error: "0275 error CMS" even after setup new bios battery and will not allow me to enter the BIOS/Setup.
This is a critical issue that I believe requires flashing the BIOS chip directly using a programmer (e.g., CH341A/RT809H), as standard software updates or resets are not possible.
I have opened the laptop and identified the main BIOS chip...
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