Need help.LENOVO T480S BIOS Problem!

[shiyab]

hello i need fix bios no data
t840s 20l8-scl0y
sn 177N2M

snid wrong

[meta99]

Hello
My Thinkpad T480s POST very slow. Here is bios dump.
S/N: PC112LYE
Type: 20L8-S2YH00
Please help!
Thanks

[hoaca388]

Hello
My Thinkpad T480s POST very slow. Here is bios dump.
S/N: PC112LYE
Type: 20L8-S2YH00
Please help!
Thanks

T480s Laptop (ThinkPad) - Type 20L8

[Migueltv61]

Hello, I need help with my BIOS. I tried using autopatch, but after that, it no longer turned on. I need another good BIOS. For my T480s, S/N PC-15QBT3 TYPE 20L8-SF1000. Please help.

[SMDFlea]

Hello, I need help with my BIOS. I tried using autopatch, but after that, it no longer turned on. I need another good BIOS. For my T480s, S/N PC-15QBT3 TYPE 20L8-SF1000. Please help.

post the original bios backup.

[CountDImi]

Hello. Having Issues with my Bios. Black screen. Keyboard lights up nothing else. Tried to replace Bios chip from other same model computer did not help.
T480S 20L8

[SMDFlea]

Hello. Having Issues with my Bios. Black screen. Keyboard lights up nothing else. Tried to replace Bios chip from other same model computer did not help.
T480S 20L8

Type the laptop serial number, full name and model, motherboard model, etc.
read the forum rules..https://www.badcaps.net/forum/troubl...before-posting

[CountDImi]

Here

[Markus1741]

Here

Hello you can try this new file ma be it helps ....

[CountDImi]

Hello after swapping BIOS chip between 2 same model laptops second working one stopped booting.
TYPE 20L8-S8SF00 S/NPC-1339ZJ 19/03 Bios and EC.bin attached.
Thank you.

[CountDImi]

Hello you can try this new file ma be it helps ....

Sorry it did not help fixing the issue.

[xugopef@mailapps.online]

Hello, I'm having trouble booting my T480s after a BIOS flash. I'm using a Pi Pico 2040 (serprog) with flashprog.
I dumped the stock BIOS three times, the checksum was the same. I added the usual patches, and how the laptop won't turn on: attempting to power on for a second (display powers up, keyboard lights up), power LED blinking three times, fan spins every few seconds.
Reflashing the stock firmware didn't help. I tried reflashing after using me_cleaner on the stock image, still nothing. Tried some BIOS images from around this forum, nothing. I even tried Coreboot, nothing.
The diodes and SMD components close to the BIOS chip seem to be okay, I checked with a multimeter.

The model code is S0L8-S6RF00, serial number PC-12ZR7C, i5-8350U

I'm attaching the stock BIOS and the modded one, thank you.

[hoaca388]

Hello, I'm having trouble booting my T480s after a BIOS flash. I'm using a Pi Pico 2040 (serprog) with flashprog.
I dumped the stock BIOS three times, the checksum was the same. I added the usual patches, and how the laptop won't turn on: attempting to power on for a second (display powers up, keyboard lights up), power LED blinking three times, fan spins every few seconds.
Reflashing the stock firmware didn't help. I tried reflashing after using me_cleaner on the stock image, still nothing. Tried some BIOS images from around this forum, nothing. I even tried Coreboot, nothing.
The diodes and SMD components close to the BIOS chip seem to be okay, I checked with a multimeter.

The model code is S0L8-S6RF00, serial number PC-12ZR7C, i5-8350U

I'm attaching the stock BIOS and the modded one, thank you.

Try # 23

[xugopef@mailapps.online]

Try # 23

Still bricked with no changes 😕

[hoaca388]

Vẫn bị lỗi mà không có thay đổi gì 😕

So the error may not be due to bios.

[Markus1741]

Still bricked with no changes 😕

Hello you can try this new files good luck ....

[xugopef@mailapps.online]

Hello you can try this new files good luck ....

Sadly nothing changed with any of the two files, thank you anyway...

So the error may not be due to bios.

At this point I'm considering a hardware issue too. Are you aware of any hardware debug interfaces (JTAG, UART, etc) I can use to get an idea?

[xugopef@mailapps.online]

Update: it's indeed a hardware issue, the clip knocked off the two 33 ohm resistors on the bottom!
I got it to boot with some bodge wires, not ideal but better than dead. I might get a new motherboard later since I ripped some pads and I don't trust the wire, and recycle this one as a server (I wanted one for Home Assistant Voice anyway).
Thanks a lot for all the help!