● Once opened, your Ledger device will no longer be refundable or exchangeable.
Microcontroller MCU
The Secure Element checks the full microcontroller flash at boot, as described in this blog
post. If it has been modified, you'll get a warning at boot. As an additional check, you can
open the device to verify that no additional chip has been added, compared with the
images below, and that the MCU is an STM32F042K6U6.
Front of the PCB
Back of the PCB
Secure Element attestation
The Secure Element itself is personalized at factory with an attestation proving that it has
been manufactured by Ledger. You can verify it by running:
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