TPM read error in rewritable firmware

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1

Hello!

I tried to fix a used Acer CB314 (N19Q2) Chromebook (Geminilake) but I’m stuck in recovery with this TPM error.

2024-04-14-17-55-07-864
2024-04-14-17-55-07-8641920×1440 200 KB

Seems like the owner before managed to get developer mode on (or is "in rewritable firmware not related to that?)

Recovery with latest image is not possible. I tried to upgrade Chrome OS with the latest octopus release for droid but failed ;(
Used the following found here:
https://chromiumdash.appspot.com/serving-builds?deviceCategory=ChromeOS

https://dl.google.com/dl/edgedl/chromeos/recovery/chromeos_15786.48.0_octopus_recovery_stable-channel_mp-v33.bin.zip

How can I get rid of this error ? I wonder what tripped it but the former owner does not know how it happened…

BTW: Goal ist to get fedora on the machine - so I don´t want any chromeos left and I´m willing to wipe with mrchrombox coreboot firmware

Hope somebody can help. Thank you!

2

https://support.google.com/chromebook/thread/8073634/chrome-os-missing-or-damaged-tpm-read-error-in-rewritable-firmware?hl=en

Edit: iirc disconnecting the battery and leaving it off for ~30 seconds might accomplish the same thing

3

I´d been through this (30 poweroffs & disconnecting the battery for more than 1 minute) already. Thanks for the hint… Found the same link.

Sadly no change whatsoever ;(

4

I can´t even toggle developer mode with ctrl-d. Thought this could change “rewritable firmware”. But keypress not recognised…