Lenovo ThinkPad L15 G3 Bios 1 IC conductor track

[1g0r]

Hello everyone,

First, the data in brief:
Manufacturer: Lenovo
Model: ThinkPad L15 G3 21C3-0016GE
motherboard: LG4 LT5 ADL RT UMA MB 8L - 448.0PZ26.0011
IC Bios 1: MX77L25650F
IC Bios 2: MX25L25673G
EC Chip: NPCX997KAABX

So far I've been a silent reader, but now I need your help

I bought a laptop. The seller said the bios was locked. I was looking for a way to remove this ban.
I then got the CH341A and pulled the corresponding files from here https://www.badcaps.net/forum/troubl...en-3-need-bios

Laptop arrived and i t then turned out that the laptop also has a supervisor password.

Okay, one thing at a time, first remove the bios password.

I started to desolder the bios chip and a pad tore off, see pictures. Unfortunately, I was no longer able to understand whether there was one or two connections on the pad.

After a long examination, I was of the opinion that there were two connections - I think it was a mistake.



In my opinion now, connection 2 and conductor track B are the only connection.

However, I connected both and tried my luck - unfortunately without success.



Unfortunately there isn't one here yet circuit diagram, but could someone send me a picture of their mainboard showing what the original connection looks like?
Could someone tell me which component my additional connection may have caused damage to - i.e. not towards the BIOS chip but the other direction.

I'll remove and check the bios chip on Monday when the children are not home - with a bit of luck I'll only have shot the bios chip.

[Maxpower3]

only this one, I think.
use dot repairing or smaller wire on the dot and wrap it like a snail to recreate a pad.

Ch341 consider the number of topics there are here for reading problems,
you will understand that it is not reliable.

For the bios password, you won't do it with reading the bios.
NCPX997 it's in the ec.
autopatcher will not work

[FriedFred]

If you are not shure about a recreation connection, better use a resistor like 1kOhm in between the wiring. In case of a wrong connection, you will not damage a signal / IC.