Had this board in drawer somewhere, haven't used it yet. So I took it, soldered SWD pins, flashed the nucleo fw and indeed it doesn't work, nothing on a2/a3. Then made a build of micropython from https://github.com/mcauser/WEACT_F411CEU6 and that one works fine so board is OK.
Then I tried to change timing as per this and it almost worked - the blue led was on after poweron. Took some time to enable USB too but now it sort of works. What doesn't work is setting button and LED as inverted. There is example in NUCLEO411 board file but it does nothing for me. So led is still on and LED1.set() turns it off and for button I need to manually enable pullup and then it works but is still inverted.
clock frequency patch
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