legion y540 15irh (81sx) problem

[Lexsmash85]

Hi, I'm Alex from California,I'm a musician and gamer.

So, i have a Lenovo legion y540 15irh (81sx). 9th gen i7 ... It originally was on windows 10 when i got it, and apparently the bios boot mode was set to legacy mode.

Well, a few years after warranry ended, and apparently Lenovo recently ended service and updates for this, my keyboard randomly stopped working, but intermittently,

Refreshing windows 10 didnt help. I managed to safely change over the boot mode from legecy to UEFI, i updated to windows 11, but keyboard issues continued.

It would work however if i did a hard power off i believe but once i turn it off or reset, the keyboard stops again..

SO HERE IS THE ACTUAL PROBLEM NOW.

i thought maybe i could try a different bios version. Am older one i seen was recommended in forums.... So whole i was on the latest BHCN45WW, i attempted to backlash to BHCN26WW with the help of chat gpt.

It seems the foash never completed because when i came back to check on the process after seeing the 3 progress bars it displays while changing BIOS versions, the screen was black and power button light blinking...

And now it wont even boot into the lenovo logo image. The novo button behaves no differently than the power button as well

I attempted to extract the bios.fd file from the bios .exe updater from the official site, put it on an mbr fat32 usb and do that whole crisis recovery thing.... But after a dozen or more tries, ive had no luck seeing any more life besides either a blinking power button light, fan on low spinning which starts a few minutes after powering on with the key combo of fn + r or b or also win plus r.

Ive only tried naming the file as bios.fd and bios.cap . The light on the legion logo on the lid does display and the keyboard will light up for a few seconds on power on, and then turn off.

And thats where i am now. And i could use some pointers because the forums aren't offering much and the youtube videos are crezy advanced and hard to understand as well.

I could really appreciate ANY advice from ANYone

[Lexsmash85]

Is there any information related to the bios? I'm trying to perform a bios crisis recovery USB and sm really having a hard time getting specific details with consistency...

[SMDFlea]

Is there any information related to the bios? I'm trying to perform a bios crisis recovery USB and sm really having a hard time getting specific details with consistency...

Post merged with your old thread topic...

When recovery methods don`t work the bios must be flashed using an SPI programmer, that means taking the laptop apart, finding the bios chip ,identifying what sort of bios chip it is - SOP8 or WSON , buying the programmer with a sop8 clip or pogo adapter if you can`t desolder the chip. If you think the learning curve is too steep and you don`t want to risk any damage take the laptop to a repair shop if it`s no longer under warranty.

[Lexsmash85]

Well, I've spent nearly a month learning all I can discover about this issue. I have the programmer and it's put together...just waiting to clip it onto the chip... Just nervous to do it is all. Especially now that I'm seeing that it is not as simple as extracting the bios.fd file from the executable (which is over 17 mb rather than 16mb like is the size of the chip...and I'm seeing that I'll still need to insure that the serial, and relevant info that keeps my Windows key intact will remain on the new flash.

Regardless, it's not so much that recovery attempts are failing but a matter of why they are failing...which is that I suspect I'm not using the required bios image that I would extract and rename to bhcrisis.bin.

Speaking of that, in my platform.ini file, the bios instructions ... There is 0 mention of bhcrisis.bin. only bios.fd.

Does that suggest I label the bios image on the USB as bios.fd?

Lastly, so if I use UEFI tool, how would I go about loading the full bios image that contains the added info like ec (which must match) etc and then locate and extract just the 16mb section relevant for this?

I have a specifications print out I made with deep seek that provides all of the model info and helpful info converted to PDF should anyone be kind enough to take a look to see if anything sticks out?