Lenovo Thinkpad T480 BIOS and EEPROM request

[Bunkee]

[ADDED INFO]
systemd-analyze
Startup finished in 31.776s (firmware) + 6.613s (loader) + 12.448s (kernel) + 14.378s (userspace) = 1min 5.217s

[Bunkee]

S-L-O-W boot times.
I recently acquired a ThinkPad T480 - Type 20L6-S0HG00, Build date: 18/05, S/N: PF17SPX4, Intel i7 - 8th generation with a locked / supervisor password protected BIOS. I successfully patched the BIOS using the autopatch instructions I found on here. BIG thanks to Knucklegrumble!
After patching and flashing, per the instructions I set BIOS settings to their default and then updated the old BIOS that it came installed with (dated 2018) to the newest 03.2025 BIOS from Lenovo's official site. I now experience unusually long boot times that take 19 seconds just to get to the red LENOVO logo and 68 seconds to get to the Linux Mint logon screen. This is with a NVMe SSD and 32GB RAM. I have read about cleaning the ME Region. Could this be the answer to the horribly long boot times?

[JoshaintPosh]

T480
info from bios

M 20L6S38300
S/N PF-159HEV
M/B L1HF88t003h
intel i7 8th gen

please Help

i got a bricked T480 and got my self a ch341a and flash the bios that I have attached this did not work and after trying different .bin files I tried to flash heads this work and then after re-flashing with the attached bios it worked and have done a USB bios utility update which worked since then have done a full Lenovo Diagnostics which found nothing wrong. Though, I think the PCIe cable is broken. So I have tied to boot form USB and two things have happened when I used balenaetcher is says error file '/boot/' not found and when using Ventoy and using normal boot it most often it is just blank with a _ in the top left of the screen when using grub2 and don't select anything after a few seconds it goes to Ubuntu loading screen but nothing happens if you actively select you get a load of text that according to Google Lens means something about security_inode_alloc I have also had xz corrupted data come up once have i flashed the bios wrong or is it the TB 3 flashing that is coursing it. After pressing the ESC key when Ubuntu is stuck loading, this comes up



Thanks in advance

F

[Maxpower3]

Has anyone tried shorting eeprom chip of t480 laptop.? i heard that on older models shorting just before bios setup removes bios pasword, like in this video https://www.youtube.com/watch?v=FW-RLkzjAS8

https://www.badcaps.net/forum/troubl...-ec-pwd-bypass

[kapiras]

Has anyone tried shorting eeprom chip of t480 laptop.? i heard that on older models shorting just before bios setup removes bios pasword, like in this video https://www.youtube.com/watch?v=FW-RLkzjAS8

[zlo13666]

Yes, indeed it's possible you have an LCD, Touchpad or RAM problem...from my "musical" experience with Lenovos
Good luck!

ram replaced again, tested with/without LCD. Caps lights up for a few seconds only...

[zlo13666]

the keyboard responds (caps lock indicator light).
if yes, start by disconnecting the battery and then disconnecting the screen from the motherboard.
test on an external screen

or use lenovo diagnostic for melody

error 0001. Connected to board only wlan module and ram stick. Using original charger from T15 gen2.

[Maxpower3]

Same issue. Possible its not bios issue

the keyboard responds (caps lock indicator light).
if yes, start by disconnecting the battery and then disconnecting the screen from the motherboard.
test on an external screen

or use lenovo diagnostic for melody

[Stefan Steff]

Same issue. Possible its not bios issue

Yes, indeed it's possible you have an LCD, Touchpad or RAM problem...from my "musical" experience with Lenovos
Good luck!

[zlo13666]

How about this dump?
Test and provide feedback.

Same issue. Possible its not bios issue

[Stefan Steff]

Same issue. Just melody((

How about this dump?
Test and provide feedback.

[zlo13666]

T480 Laptop (ThinkPad) - Type 20L6

Same issue. Just melody((

[hoaca388]

Pls help me to fix no boot/black screen(melody) on my T480 i7/mx150.
Type 20L6-S29D08 S/N: PF-1J954M
Few months ago it was purchased as dead. Some dump from here was helped but now its not booting just melody

T480 Laptop (ThinkPad) - Type 20L6

[SMDFlea]

You`re welcome :-)

[zlo13666]

Pls help me to fix no boot/black screen(melody) on my T480 i7/mx150.
Type 20L6-S29D08 S/N: PF-1J954M
Few months ago it was purchased as dead. Some dump from here was helped but now its not booting just melody

[Luis Martin]

Extract the attached zip folder, make a USB recovery drive with mkusbkey.bat ,boot from the USB drive and it will or should update the bios and EC.

Thanks!, it works. IDK what the EC (Embedded Control) was, but I do a quick search on Chat-GPT explained very good even teach me how to modify hex data using hex editor programs.

[SMDFlea]

this bios

Extract the attached zip folder, make a USB recovery drive with mkusbkey.bat ,boot from the USB drive and it will or should update the bios and EC.

[Luis Martin]

To be honest idk, i just get a update firmware pop-up and click on it.

I find this .bin on another forum and I flash it, and it works now i got Lenovo screen and i can go to bios but .... now if i plug a hdd/ssd the system just start blinking the screen in black.
If I remove ssd the system boot from my usb to install operating system but I can't because no ssd installed. 🤔

this bios

[Luis Martin]

Did you get the update from LVFS https://fwupd.org/ ,was the EC updated as well.

To be honest idk, i just get a update firmware pop-up and click on it.

I find this .bin on another forum and I flash it, and it works now i got Lenovo screen and i can go to bios but .... now if i plug a hdd/ssd the system just start blinking the screen in black.
If I remove ssd the system boot from my usb to install operating system but I can't because no ssd installed. 🤔

[SMDFlea]

Thank you SMDFlea.

Unfortunately doesn't work.

Did you get the update from LVFS https://fwupd.org/ ,was the EC updated as well.