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:

1. Downloaded stock BIOS BHCN39WW from Lenovo
2. Trimmed it to 16MB
3. Extracted the BIOS region from the corrupted dump
4. Extracted the BIOS region from the stock 39WW
5. Replaced the corrupted BIOS region with the stock one (within hxd , opened the corrupted dump and replaced its region by the stock)
6. Injected back my LDGB / DMI

...

This specification for the LENOVO Legion Y920 can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the Legion Y920 boardview and Legion Y920 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for LENOVO Legion...

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...

Hello everyone,
I need help with my Lenovo Legion laptop. It turns on for a few seconds and then immediately shuts down. I believe this is a BIOS corruption issue.
Laptop Model:

• Model: Lenovo Legion Slim 5 16APH8
• GPU: NVIDIA GeForce RTX 4070
• Main BIOS chip size: 32MB
• VBIOS chip size: 16MB

Problem Description: The laptop was working perfectly. Now, when I press the power button, the keyboard lights up and the laptop powers on for just a few seconds, then it shuts itself off completely. After researching, I am convinced it's a corrupt BIOS.
What I Have Tried So Far:

1. I

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This specification for the Lenovo Legion Y920 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Y920 boardview and Y920 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo Legion Y920...