Thinkpad L480 Bios repair

[makisdal]

Hello,

After i patched the bios and did the steps according to the guide,
I reflashed the original bios and laptop stucks in : Entering bios.....

Could someone help me?

Type 20LT-S7DY00 S/N:PF-1GHWNB

[artvandelay2]

Thank you! This helped me too although I have the ThinkPad L480 Type 20LS not 20LT. I had the same errow showing "(A7) Me Downgrade - Request MeSpiLock Failed" and always shutting down after ~40 seconds or less indepentendly if I was in BIOS or OS. The BIOS-Chip is a MX25L12873F.. near the Intel WiFi-Module and above the second RAM-Slot.
Now it runs fine without any error message. The only question I have here is if it is expected to run fine like in the sense if the BIOS is somehow less important atleast if it is in the same category as in product line, model no. etc.

The problem accured after an installation of Kubuntu, as far as I understand the BIOS may got bricked with an update via Kubuntu or maybe it has somethin to do with SecureBoot or TPM, I really don't know but maybe someone can explain what it could really have been. Atleast I therefore deactivate now within the BIOS any update-mechanism for the BIOS, especially before installing a new OS etc. (BIOS -> Security -> UEFI BIOS Update Option -> Windows UEFI Firmware Update: Disabled; I don't know if I should also disable "Flash BIOS Updating by End-Users".

Something I don't understand is why Lenovo doesn't have also the BIOS-File solely on their pc-support help for specifically this and also other laptops.

For now I don't need any assistance or else but I leave this post for documentation purposes so other Users, not having the 20LT-version but the 20LS, can hope that this BIOS also works.

Thanks again everyone for the work and help, have a nice day!

I have this exact issue with my L480, and it emerged after i installed Debain 12 instead of the previous windows 10 os. I have tried to flash the bin file extracted from the rar file but couldn't get the broken laptop to read from the USB, i have tried several different key combinations when booting but still it just shuts down after about 30 seconds with the (A7) Me FW Downgrade - Request MeSpiLock Failed error. How did you manage to flash the bios?

Specs:
Machine type model: 20LTS4NY00
SN: PF1HKU2G
System board serial number: L1HF8BP05Y8
corrupted bios: R0QET67W

Should also mention that the ME firmware version filed is blank.

I will much appreciate any help on this issue

[SMDFlea]

I have this exact issue with my L480, and it emerged after i installed Debain 12 instead of the previous windows 10 os. I have tried to flash the bin file extracted from the rar file but couldn't get the broken laptop to read from the USB, i have tried several different key combinations when booting but still it just shuts down after about 30 seconds with the (A7) Me FW Downgrade - Request MeSpiLock Failed error. How did you manage to flash the bios?

Specs:
Machine type model: 20LTS4NY00
SN: PF1HKU2G
System board serial number: L1HF8BP05Y8
corrupted bios: R0QET67W

Should also mention that the ME firmware version filed is blank.

I will much appreciate any help on this issue

post your bios backup