Hello, and thanks in advance.
Im trying to remove the Supervisor Password for a Lenovo Thinkpad X1 Yoga gen3 with 8th gen intel core i7 vpro, when i tried to boot from patched bios it just beeps, and i got a black screen.
Reflashing original bios let me boot windows again.
Laptop: Thinkpad X1 Yoga gen3
Type: 20LE-S2RG00
S/N: R9-0VQ9ZE 19/07
Bios: WINBOND 25Q128JVSQ...
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Need Clean BIOS/EC Bin File for Lenovo ThinkPad Yoga 11e 2H1703-27220F Rev. A Marked as U2501 on the motherboard.
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...2 Photos -
ThinkPad X13 Yoga Gen 1 (Type 20SX) Password Removal
Hi,
I didn't find a request for this specific SKU yet, but... I need the bios password removed from it.
(The tamper protection triggered randomly one day)
Here's as much info as possible about it:
- ThinkPad X13 Yoga Gen 1 (Type 20SX)
- SN R90YLACQ
- Model 20SX002XGE
- CPU 10th Generation Intel® Core™ i7-10510U
- Lenovo-Support page for convenience
And here are what should be valid EC and BIOS dumps (from an external reader)... -
Lenovo ThinkPad X1 Yoga Gen 5
Hello i have here X1 Yoga Gen 5, sometimes laptop turns on but but it usually won't.
When laptop won't turn on, the fan starts and the power light comes on,and stays.
I will attach the bios file, could it be problem in the BIOS?
Motheboard is NM-C881 Rev:1.0
SN : PF-2GDA60
Type Number : 20UC-S17W1D... -
Please help. I'm looking for a reliable BIOS update, and if available, also for the EC.
The laptop turns on but displays no image. When I update the BIOS using files available online, the laptop stops turning on and the power button flashes three times.
Laptop :
Lenovo ThinkPad X1 Yoga Gen 5
SN : PF-2D7PT6
Type Number : 20UB-002NPB
Motherboard :
GX490 NM-C661
Rev : 1.0
CPU : SRGKW
I am attaching the original BIOS file.
Thank you very much in advance for your help. 🤗
...Leave a comment:
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Lenovo X1 Yoga Gen 5 - Supervisor Password Removal
Hello,
Can I please ask anyone to assist with a patch to remove the supervisor password from the below bios dump.
Lenovo ThinkPad X1 Yoga Gen 5
S/N: PF2WLEZB
Thank you in advance for your time.... -
Hi,
I need a patched BIOS version for X1 Yoga 4th generation. Autopatcher did not help, the laptop beeps many times, and the screen remains black.
MB: NM-B861
Type: 20QG-S4K100
Serial: PF-2622VP
Thank you...Leave a comment:
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Thinkpad X1 Yoga Gen 3 ,How to know if the BIOS is corrupted
Hi everyone, hope everyone's having a great day.
I have a Lenovo Thinkpad X1 Yoga Gen 3 for repair. (20LES3T900)
I looked in every corner and the laptop seems fine. Its pulling 500mA but no display, no noise, nothing.
So I assume its a BIOS issue. I downloaded the BIOS with CH341A and opened it on ME Analyser and didn't receive any errors.
Does this mean the BIOS is fine? making it a hardware issue?
I downloaded fresh BIIOS from the Lenovo site and used Hex Editor replace the Lenovo's BIOS into my BIOS region. But the file size ended up being... -
Thinkpad L13 Yoga Gen 4 - BIOS request
Hello everyone,
I need a BIOS for the Thinkpad L13 Yoga Gen 4.
S/N: PW05KQH7
Type Number: 21FR-0005GE
A recent BIOS update from Lenovo has bricked the laptop.
Currently there is no charging light.
According to Lenovo's website, the BIOS version R26ET41W/EC R26HT28W (r26uj08w) has been withdrawn due to issues with the system failing to power on after the BIOS/EC update. -
Lenovo X1 Yoga 7th Gen (Type 21CD, 21CE) Laptop bios locked
Hello, I have a Thinkpad X1 Yoga Gen 7 21CD my bios is locked, can someone please help me to unlock it
https://driv************************...w?usp=drivesdkLast edited by SMDFlea; 10-28-2023, 04:24 PM. -
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Bios for Lenovo ThinkPad X13 Yoga Gen 4
Intel I5 - 1335U
16 GB RAM
Type 21F2
Board LCFC KX3B0 KX3D1 NM-E812 Rev: 1.0
Read from a working device.
I unsoldered two large chips for reading.
I read the third one without removing it from the board.
I read each chip 3 times and the dumps matched (I didn't write the firmware to the chips again for checking).
... -
Eureka, m1ch43lzm because of you I found it! When you said that "It's normal to be missing according to this, it comes on when needed" about the iGPU voltage, I decided to change PU402 as it seemed a little fishy with the voltage readings I was getting from it (input instead of 5.0V I was getting 4.8V). And that was it, it's now working as expected!
Should also mention that I had come across this thread which made me change the settings in Windows - good to know: https://forums.lenovo.com/t5/ThinkPad-L-R-and-SL-series-Laptops/Horrible-power-limit-throttling-issue-on-Len...Last edited by rddube; 07-30-2025, 06:44 PM.Leave a comment:
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