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Signature verification failed #12606 (MINI/MINI+)

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Relevant for:
MINIMINI+
Last updated 2 days ago
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CSPLDEESITFR

What happened?

When trying to install non-official firmware, the screen shows "Firmware signature verification failed! Only official signed firmware can be flashed.".

Error name: Signature verification failed

Error code: #12606

The printer has detected the attempt to flash a firmware that does not have the private key signature that verifies the firmware as being official.

How to fix it?

The Original Prusa MINI/+ in its factory state only accepts official firmware. In order to flash a custom firmware, it is necessary to break the appendix seal on the Buddy board. See how to do that here.

Breaking the appendix seal won’t void your warranty, so you are free to flash custom firmware. 
However, since there is no way for us to verify or test every single custom firmware on the internet, we disclaim liability for any kind of damage or harm a printer with a broken seal may cause (e.g. in case of a fire). 
So, please, don’t mindlessly flash suspicious files! 
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