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hach
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Last Activity: 09-15-2024, 04:14 AM
Joined: 09-07-2024
Location: loubfdjnvj
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  • hach
    replied to Lenovo Thinkpad Ec Pwd Bypass
    Hi [USER="240937"]Maxpower3[/USER] ,

    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?​Maxpower3
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  • thanks! i'll try this method...
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  • (edited, sorry I misread the thread)

    if my understanding is correct, this means that for this model I need to work on dumping/flashing the EC and not the bios, i.e. with a program other than CH341A.
    Can you confirm this?
    If so, how do I dump the EC on this model?​...
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  • Thanks for your feedback, I ordered a CH341A programmer.

    Concerning copying the bios from another laptop, I don't have an OEM windows key but serial numbers could be copied....

    Would the following procedure work?
    - dump the bios on my working laptop
    - change the bios password
    - dump the bios again
    - do a diff to identify the area where the password is stored
    - => modify this zone on the blocked laptop
    I'm wondering whether there might be checksum or other issues, and if so, whether the autopatcher method might not be simpler.
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  • Hello,

    My laptop is also blocked because I forgot my supervisor password.
    It's an AMD P14s gen4 (serial PF54NMJB), I have another copy of exactly the same laptop.

    My questions:
    - I'm not sure how to dump/flash the bios, is it really a CH341A programmer that should be used?
    - is it possible to read the bios of the laptop I know the password for and flash it on my other laptop? (they're exactly the same model).
    - if not, what should I do?

    Thanks for your help
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