Thinkpad L480 Bios repair

[hoaca388]

Re: Thinkpad L480 Bios repair

Hi all,

I have a couple of L480 with issues if anyone can help please.

First one has a corrupted BIOS and would not boot. I flashed a working file from a different L480 and it boots but goes off after 10sec.

Second L480 has "0188: Invalid RFID Serialization Information Area" on boot.

Original BIOS dumps attached (these had passwords but I have now removed them).

Both are 20LT-S4SP00. board NM-B461

SN (bad flash): PF1EPTCK
SN2 (RFID error): PF1H1V7H

Thanks
Chris

L480 Laptops (ThinkPad) - Type 20LT

[mp3boy]

Re: Thinkpad L480 Bios repair

L480 Laptops (ThinkPad) - Type 20LT

This fixed the first one (PF1EPTCK), thank you.

0188 RFID Serialization error still present on the other one. I will have a play around with u1 tool as suggested by SMDFlea on another thread.

[mp3boy]

Re: Thinkpad L480 Bios repair

This fixed the first one (PF1EPTCK), thank you.

0188 RFID Serialization error still present on the other one. I will have a play around with u1 tool as suggested by SMDFlea on another thread.

Fixed with U1 tool. The important step seems to be initialising the EEPROM. First I tried just deleting/rewriting some of the data individually which didn't work.

Step 1: Menu 2, Menu 2, take note of B0 and C0 serial number. These are also on the barcode labels on the motherboard.
Step 2: Menu 5, Menu 2, take note of EEPROM data. I'm not sure how much of this is relevant.

Step 3: Menu 5, Menu 1, initialise EEPROM
Step 4: Menu 2, Menu 1, re-add B0 and C0 serial.
Step 5: Menu 4, Menu 2, re-add Brand Name
Step 6: Menu 3, assign UUID.

[testinglaptops]

Lenovo ThinkPad L480 (type 20LT-S1Y600)
Part Number= NM-B461 - REV 1.0
Serial Number = PF16D32Y

Hello, laptop power on for 15 to 20 seconds with no display. then power off. all volts on coils but only PL403 (+VCC_GT) Volt missing. I tried clean me bios but laptop restart continuously with no display.
PLEASE repair this bios. this is original bios. thank you

[gts]

Thinkpad L480 Bios repair

system-serial No.PF1M4W4G
TYPE: 20LSS0GL00

Hi All , I have Lenovo thinkpad L480 CMOS PASSWORD protected. can someone help me remove the bios password .i attached the BIOS file and SERIAL No.Thanks in Advance.

[Vesko356]

As far as I can see the thread title is "Thinkpad L480 Bios repair", not a Thinkpad L480 Bios password?!
Secondly did you read RULES UPDATE for BIOS requests/offers *AVOID BANNING, READ BEFORE POSTING* and BIOS guides, methods, resources and tools threads?

3.7.2. DXE password bypass driver injection (2012-2018)
For newer machines (2012-2018, 4th to 8th gen Intel), the password itself is stored in the EC. BIOS must be modified and re-flashed to insert a special driver that will allow bypassing the BIOS password.
Refer to https://www.badcaps.net/forum/showthread.php?t=87588 and https://www.badcaps.net/forum/showthread.php?t=81573

Requests for password removal or BIOS repair for which the method is available at BIOS guides, methods, resources and tools will not be tolerated anymore if you do not explain why you did not succeed.

[gts]

Thinkpad L480 Bios repair
Hi friends ,
i tried auto patcher but no display.
again i put the old it works display comes..
my laptop model is
system-serial No.PF1M4W4G
TYPE: 20LSS0GL00
i am seeking help please.

[hoaca388]

Thinkpad L480 Bios repair
Hi friends ,
i tried auto patcher but no display.
again i put the old it works display comes..
my laptop model is
system-serial No.PF1M4W4G
TYPE: 20LSS0GL00
i am seeking help please.

CCC

[gts]

CCC

Thanks for your response .
it is no power with your files.

[abdelilahocs]

Re: Thinkpad L480 Bios repair



L480 Laptops (ThinkPad) - Type 20LT

thanks it works fine

[nkeemik]

BIOS of my L480 was updated, laptop was fully charged and adpater was connected. Now my L480 is dead, no picture at all and I get

Error code : 0285
Description : TCG-compliant functionality-related error (might be the TPM initialization failure)
Model : L480 (type 20LS, 20LT)
Serial : PF117136


I am thinking to reflash, downloaded the BIOS Update (Bootable CD) r0quj32wd.iso, wrote it to USB drive (FAT32). Tried several options to initiate flashing from USB but none of them worked (Fn + R while powering on).

Any help would be really appreciated.

[Fronczek]

Hi!
Instead of burning the image, try to download the executable. It has an extract option, and in the extracted folder you get instructions how to make a flashing USB drive.
This might sound controversial, but generally I'd advise against BIOS updates if everything works just fine.

[nkeemik]

Hi!
Instead of burning the image, try to download the executable. It has an extract option, and in the extracted folder you get instructions how to make a flashing USB drive.
This might sound controversial, but generally I'd advise against BIOS updates if everything works just fine.

My laptop is "bricked", there is no picture on LCD nor on HDMi device -- I can not event turn off the secure boot. Any further instructions how to reflash ?

Lenovo instructions about creating bootable USB were not helpful to me...

https://download.lenovo.com/pccbbs/m.../r0quj31wd.txt

[Fronczek]

If the USB flash doesn't work I'm afraid your only option is desoldering the chip(s) from the board and manually writing the BIOS to them.

[Stefan Steff]

BIOS of my L480 was updated, laptop was fully charged and adpater was connected. Now my L480 is dead, no picture at all and I get

Error code : 0285
Description : TCG-compliant functionality-related error (might be the TPM initialization failure)
Model : L480 (type 20LS, 20LT)
Serial : PF117136


I am thinking to reflash, downloaded the BIOS Update (Bootable CD) r0quj32wd.iso, wrote it to USB drive (FAT32). Tried several options to initiate flashing from USB but none of them worked (Fn + R while powering on).

Any help would be really appreciated.

Hello!

TGC comes from Trusted Computing Group the developers of TPM.
I think the firmware in the TPM chip was not completely updated and that's causing your error...
So first try to update the TPM firmware from a Windows, booted from USB stick.
You can download the firmware update utility from here: https://support.lenovo.com/us/en/dow...20m3-20m4-81cg
If that's not working only swapping/changing the TPM chip will help you.
This is my opinion...Good Luck

[Aditya11ttt]

Tested EC and Main Bios !!! L480

[Eduardo Blancas]

Hello, good afternoon. I need help with the .bin BIOS file for a Lenovo L480. The chip is a Winbond 25Q128JVSQ and the motherboard model is El480/El580 NM-B461. The issue is that only the power button LED lights up and the keyboard does not display any image.

[Aditya11ttt]

Hello, good afternoon. I need help with the .bin BIOS file for a Lenovo L480. The chip is a Winbond 25Q128JVSQ and the motherboard model is El480/El580 NM-B461. The issue is that only the power button LED lights up and the keyboard does not display any image.

Try bios from post 35

[Italyfan]

Lenovo Thinkpad L480 - Type 20LTS9PN00
S/N: PF-1PGFWR
Motherboard: NM-B461
Bios show error "(A7) Me Downgrade - Request MeSpiLock Failed" then turn off after 1 minute
Please help me rebuild the bios dump.
Many thanks

[hoaca388]

Lenovo Thinkpad L480 - Type 20LTS9PN00
S/N: PF-1PGFWR
Motherboard: NM-B461
Bios show error "(A7) Me Downgrade - Request MeSpiLock Failed" then turn off after 1 minute
Please help me rebuild the bios dump.
Many thanks

Me Downgrade

[Italyfan]

Me Downgrade

Thank you very much. It works