Downgrade ECP

Discussion in 'BIOS Mods' started by Czab, May 19, 2022.

  1. Czab

    Czab MDL Novice

    Nov 21, 2021
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    Hello.

    I have a Lenovo ThinkPad T400 laptop and I need to downgrade my BIOS and ECP to an older version.
    I have a ".BAK" file made by WinPhlash and I succesfully flashed an older version of BIOS to my laptop from it. But the ECP remains unchanged. Is there a way to dump the ECP from another laptop and flash it to mine?

    Regards
    Juha
     
  2. Asparagus Lover

    Asparagus Lover MDL Member

    May 17, 2019
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    What the ECP is? And also why you need to change it?

    Forgive me for my ignorance.
     
  3. Czab

    Czab MDL Novice

    Nov 21, 2021
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    ECP (Embedded Control Program) is responsible of many background tasks and generally you should have the correct ECP version for the BIOS version you are running.
    Although there is some backwards compatibility, but I believe my system has become somewhat unstable because I now have an ECP that was not intended to be used with the BIOS version I have installed.

    If you download an update package from Lenovo's website it will update both BIOS and ECP. But they only have the latest versions.
     
  4. Czab

    Czab MDL Novice

    Nov 21, 2021
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    Thank you!!!