Lenovo Thinkpad Ec Pwd Bypass

[Maxpower3]

NM-B461
pin 7/8/9/10

[hach]

Hi Maxpower3 ,

First of all thank you for your great work!

I'm trying to remove the BIOS password from my p14s gen 4 amd (21K5), would the method described work on this model?
I'm trying to locate the EC on the motherboard but can't find it, would you have any information on the EC location or how to access the LPC bus?

[santoslao]

Hello friend
Maxpower3 I am immensely grateful for your collaboration with the community, your knowledge and study have certainly helped a lot of people here. I would like to know if there is any news or any evolution in relation to the T14 Gen2 MEC1503

[Andreasbest]

hach
santoslao
Hello.
Both of you must find schematics and search for words "LAD" and "eSPI"
If you found "LAD" is possible
If you found "eSPI" is not possible.

[santoslao]

hach
santoslao
Hello.
Both of you must find schematics and search for words "LAD" and "eSPI"
If you found "LAD" is possible
If you found "eSPI" is not possible.

Thank you for these ways, but unfortunately t14 gen2 only has eSPI in its scheme. The fact is that there are people who do this unlocking but are keeping the seven keys, they don't sell and also don't contribute with the information, I've already taken more than 10 pieces of equipment of this model and dismissed it for not having a solution for them, and giving it as scrap. Right here in the forum there are people who say they managed to solve it but don't pass on the information.

[Andreasbest]

Well it's known that it can be done but with programmer.
If you have many Lenovo with eSPI then it's worth it to buy a SVOD programmer and do it your self.

[Maxpower3]

Thank you for these ways, but unfortunately t14 gen2 only has eSPI in its scheme. The fact is that there are people who do this unlocking but are keeping the seven keys, they don't sell and also don't contribute with the information, I've already taken more than 10 pieces of equipment of this model and dismissed it for not having a solution for them, and giving it as scrap. Right here in the forum there are people who say they managed to solve it but don't pass on the information.

https://www.badcaps.net/forum/troubl...15#post3238715
work on amd (tested ok) but no intel

t14 gen3 amd not work
https://www.badcaps.net/forum/troubl...32#post3279732

[Andreasbest]

edit
after many try
I managed to enter the bios, but the tabs are missing.

The Espi connector is not connected, the resistors are missing

so it must be connected near the EC

I have to start very early to pass, well before backlighting.
I have not yet fully understood how.
I also managed to get errors like uuid or others


not yet able to remove the password

ON T480s 1.13 that i had missing tabs and UUID errors i managed to get all tabs with glitch right before lenovo logo and probably some milliseconds with logo too.
Early glitch gave me exactly these errors.
Try this way, very interesting case.

Update:now that i remember details, i never managed to trigger the glitch with 1.13 so i updated to next version of bios. Try next version too and try the way i wrote

[ibo]

What i know is MEC 1505 doesnt support any programmers

[santoslao]

What i know is MEC 1505 doesnt support any programmers

Some people claim to have unlocked it. Until then it's a mystery, because I've heard that some can do it, but they're keeping this "big secret" under 7 keys,They say they are afraid of spreading everywhere.
PS: as if all mec1503 machines only exist for them.

[azanwaqas771]

Hello friend
Maxpower3 I am immensely grateful for your collaboration with the community, your knowledge and study have certainly helped a lot of people here. I would like to know if there is any news or any evolution in relation to the T14 Gen2 MEC1503

It’s PROGRAMMBLE but MEC1503 SRAM-based nature. It’s not a rom. So you can’t program from programmer. Mec1503 collect data from main bios when power on. • SRAM is volatile memory, which means it does not retain data when the power is turned off.

[santoslao]

It’s PROGRAMMBLE but MEC1503 SRAM-based nature. It’s not a rom. So you can’t program from programmer. Mec1503 collect data from main bios when power on. • SRAM is volatile memory, which means it does not retain data when the power is turned off.

Your explanation is very good, so will changing the mec1503 chip resolve the blockage? I saw some selling on aliE.

[ibo]

It’s PROGRAMMBLE but MEC1503 SRAM-based nature. It’s not a rom. So you can’t program from programmer. Mec1503 collect data from main bios when power on. • SRAM is volatile memory, which means it does not retain data when the power is turned off.

So how we can unlcock then?

[Maxpower3]

If there is no data after a reset or power off, it must be in the BIOS but there is an integrity check??

[rediii]

It’s PROGRAMMBLE but MEC1503 SRAM-based nature. It’s not a rom. So you can’t program from programmer. Mec1503 collect data from main bios when power on. • SRAM is volatile memory, which means it does not retain data when the power is turned off.

proof?

[santoslao]

Until then, each one speculates a type of theory, the fact is that it came from the factory and it was programmed. There are people who are managing to unlock these machines with MEC1503, but they keep this secret at 7 keys as I said before.

[Maxpower3]

Until then, each one speculates a type of theory, the fact is that it came from the factory and it was programmed. There are people who are managing to unlock these machines with MEC1503, but they keep this secret at 7 keys as I said before.

it's not me

proof?

https://www.badcaps.net/forum/troubl...39#post1867039

[rediii]

it's not me



https://www.badcaps.net/forum/troubl...39#post1867039

this is no proof for me, sry. i doubt it. i once went to the trouble of unlocking a locked t15 g2 by replacing the mec1503.

[Maxpower3]

this is no proof for me, sry. i doubt it. i once went to the trouble of unlocking a locked t15 g2 by replacing the mec1503.

for more info that's all, I don't know anything about it.
I just know about short circuits

[rediii]

for more info that's all, I don't know anything about it.
I just know about short circuits

you are doin‘ a good job for the whole community.