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HPBird
Paper Tape
Posts: 4
Registered: ‎04-09-2017
Location: US
Views: 717
Message 1 of 2

L540 Update BIOS 1.88 later will hang( no logo) on BIOS Post first time after OS shutdown normally.

On BIOS 1.88 have fix description:

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[Problem fixes]
- Fixed an issue that system no VGA output when install Ultra Dock with 4K monitor.

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My L540 laptop with Ultra Dock without 4K monitor ( just plug an LCD 1440*900 monitor), it will always hang on first BIOS Post(after Windows normal shutdown), force shutdown, power up again. it can normally boot.

 

Does the latest 1.89 BIOS have the same situation? I can not update due to it no way to rollback old version BIOS.

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[Important updates]
- Update includes a security fix.
  (Note)If the UEFI BIOS has been updated to 1.89 or higher,
        it is no longer able to roll back to the version before 1.89
        for security improvement.

= = =

 

HPBird

HPBird
Paper Tape
Posts: 4
Registered: ‎04-09-2017
Location: US
Views: 667
Message 2 of 2

Re: L540 Update BIOS 1.88 later will hang( no logo) on BIOS Post first time after OS shutdown norma

After update the ultra dock new firmware, the problem have fix.

reference to https://support.lenovo.com/py/en/solutions/pd028010

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