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madstitz
Blue Screen Again
Posts: 3
Registered: ‎05-24-2016
Location: DE
Views: 325
Message 1 of 3

Can't update BIOS on T460p after mainboard replacement

I recently had my mainboard replaced by a lenovo technician after my thinkpad T460p switched off and refused to turn on again.
The new mainboard has BIOS version 2.15 installed, which is fairly ancient.
I now wanted to update to the latest BIOS (2.26) via the bootable CD method.

I can successfully boot from a usb stick with the aforementioned image installed and start the bios update.
However, ~5 seconds after the installer says it is now updating the firmware, I get the following error, claiming that I can't update the BIOS because BIOS Guard is enabled:
IMG_20181005_210839.jpg


Now my question is: How can I disable this BIOS guard to be able to update my BIOS? I can't seem to find a setting named something like that in my BIOS.

I have full access to the machine and its BIOS. Secure Boot is disabled, CSM boot is enabled, a harddrive password is set.
Any more information that I can provide to solve this issue?

Thanks and greetings
Martin

Community SeniorMod
Community SeniorMod
Posts: 9,850
Registered: ‎01-01-2010
Location: US
Views: 305
Message 2 of 3

Re: Can't update BIOS on T460p after mainboard replacement

Look on the security tab in the BIOS.  There should be an entry for Intel SGX and one for Devgice guard.  Try turning those off


Rich


I do not respond to requests for private, one-on-one help. Your questions should be posted in the appropriate forum where they may help others as well.

If a response answers your question, please mark it as the accepted solution.

I am not an employee or agent of Lenovo.
madstitz
Blue Screen Again
Posts: 3
Registered: ‎05-24-2016
Location: DE
Views: 298
Message 3 of 3

Re: Can't update BIOS on T460p after mainboard replacement

Thanks for that tip!
I had both settings disabled, so simply disabling those doesn't help.
HOWEVER, when I changed SGX Control from "Disabled" to "Software Controlled" (Current State: Disabled), the BIOS update worked!

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