"Hello, I am contacting you because I have an issue with a Stanmore 2 motherboard. By mistake, I burned the STM32 by injecting 5V instead of 3.3V (beginner's mistake...). So, I am looking to extract the firmware from a healthy Marshall (either an Acton 2 or a Stanmore 2, as the printed circuits are almost the same and I assume that the STM32 firmwares are the same), and then replace the STM32 on my Marshall by injecting the correct firmware.

I encountered the same issue as you did regarding the limitation due to level 1 (or 2) protection of the STM32 encoded by Marshall. Recently,...