Problems flashing BIOS for supervisor locked Lenovo V15 G4 IRU 831A laptop

[JDong]

There was an error... Aborting......I'm using another Linux Laptop with Zorin OS...to try and patch my Lenovo V15 G4 IRU with above specs....It originally had Windows 10/11 installed and converted to a dual boot Kali OS/Parrot OS system. I may have used the wrong lenovo_autopatcher_0.2 (I believe was posted by @knucklegrumble....I am out of ideas and flat broke so i cannot afford another fix (spent it all as an e-com entrepreneur does) any help from anyone would be GREATLY appreciated.....

• Laptop Model: Lenovo V15 G4 IRU
• Issue: Forgotten supervisor password.
• BIOS Chip: GD25B128E (or GD25B128B if that's what flashrom -L reported).
• BIOS Version: The exact version you noted from UEFITool.
• What you've tried: Mention you've successfully dumped the BIOS with CH341A/flashrom, and you've tried a lenovo_autopatcher but it gives the "corrupted or not valid dump" error.
• Crucially: Attach your backup.bin file to the forum post. This is the file they will need to analyze and help you with.

I have attempted your amazing instructions on how to do a dump then patch and flash the BIOS with the CH341A USB Programmer but get the message....Using UEFIReplace to inject 2 DXE drivers...
[1/2] LenovoTranslateService (GUID 826bcf56-bac4-43f4-8ea1-8cdf0a121abd)
first_dump.bin is corrupted or does not contain a valid dump.
There was an error... Aborting......I'm using another Linux Laptop with Zorin OS...to try and patch my Lenovo V15 G4 IRU with above specs....It originally had Windows 10/11 installed and converted to a dual boot Kali OS/Parrot OS system. I may have used the wrong lenovo_autopatcher_0.2 (I believe was posted by @knucklegrumble....I am out of ideas and flat broke so i cannot afford another fix (spent it all as an e-com entrepreneur does) any help from anyone would be GREATLY appreciated

[SMDFlea]

The Autopatcher does not work with this model. Post your original backups and someone will help.

[JDong]

Hi, Here is my backup that i took from supervisor locked Lenovo V15 G4 IRU, 83A1, laptop.....i tried zero'ing out the first few lines of hexadecimal using Ghex, as instructed by elsewhere, once i found syspassword with UEFITool. I saved the file, reatached body with UEFITool, saved it as a Lenovo_modded_backup.bin.....used flashromto flash it and eveything appeared to go well and was verified, but first boot took 30 seconds or so for screen to display Lenovo logo and message to not power off as the Bios was ressetting, (or something similar) then it ended up at the blue supervisor password screen, turned off after a few seconds and back on but no screen. wasn't working, just like its off but the fan was running like it was on. Tried unplugging internal battery and CMOS battery and holding power button for 30 seconds, waited a minute and only using power cord, tried to boot to the same problem of dark screen....so i'm stuck and believe i need a good fresh copy to flash for the bios? IDK...it was my first time ever doing this bug to no avail...do you need anything else other than the attached backup.rar (which i changed to rar since you can't upload .bin files) Thanks JDong

[JDong]

Oh, i used the CH341A to flash get the backup file and then flashed the modified one..

[JDong]

I used the mccn33ww.16 BIOS file and secured the SOIC8 clip to the BIOS chip for a hot flash, with AC and CMOS batteries connected (but didn’t realize the power pack wasn’t fully seated). I stayed completely still during the flash, and it completed successfully. At first, the Lenovo stayed dark but no longer shut down after three seconds. Pressing the NOVO button made it beep but still nothing on the display until I saw a faint dialog asking for the hard drive password. After removing the SSD and rebooting, the BIOS menu briefly appeared, confirming the flash worked—my only issue was a dark display, which turned out to be a damaged display ribbon. Pulling the SSD revived the “bricked” laptop. Now I just need to find my hard drive password. Any idea why this worked? Thanks for the BIOS files provided.